Demon Slime | Demon Slayer x Rimuru
TheFreshWaffles
  • Reads 191,365
  • Votes 5,983
  • Parts 20
  • Time 2h 46m
  • Reads 191,365
  • Votes 5,983
  • Parts 20
  • Time 2h 46m
TheFreshWaffles
Ongoing, First published May 17, 2021
animecrossoverdemonslayerdiablofanfictionfictiongiyugiyuuinosukeisekaikanaokimetsunoyaibamilimnezukoraphaelrengokurimurushinobushunaslimetanjirotensurathattimeigotreincarnatedasaslimettigraaszenitsu
3 years after the defeat of Yuuki...

In this timeline, Rimuru is bored and getting increasingly impatient. In a hope to satisfy this eternal boredom, he ends up, with the help of Ciel-sensei, dimension-hopping into the world of Demon Slayer. 

How will things play out in this new world and how will the story of Demon Slayer change?

(Rimuru is very heavily nerfed, at least for now).

*I DO NOT own Demon Slayer or That Time I Got Reincarnated as a Slime. The characters and plot that are depicted in this story either belong to Koyoharu Gotouge, or Fuse. All art in this story also belongs to its respective owners and I do not own them in the slightest.
All Rights Reserved
animecrossoverdemonslayerdiablofanfictionfictiongiyugiyuuinosukeisekaikanaokimetsunoyaibamilimnezukoraphaelrengokurimurushinobushunaslimetanjirotensurathattimeigotreincarnatedasaslimettigraaszenitsu
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20 parts

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[BOOK 2] That Time I Traveled as a Demon Lord by BlameMyGamingChair
28 parts Complete
Sequel to "A demon in a Ninja world" Things to do: 1. Got reincarnated. ☑ 2. Got nerf'd. ☑ 3. Died. ☑ 4. Revive yer self on the other "other" World. ☑ Well, those are some plot twist for ya. The plot armor is just getting +∞ on Def. And now... My wife is a slime. Geez. Screw fire nation. My real nemesis was the "gender" benders all along. 《Warning. Major tensei shitara slime datta ken (tensura) spoilers》 Status: Completed Sequel: That time I travelled as a demon lord: Tenma War, That time I travelled as a demon lord: Ninja War Prequel: A Demon in a Ninja World. Highest rankings: #1 in genderbend 19/8/21 #1 in slime 2/9/21 #2 in sharingan 4/9/21 《DISCLAIMER》 《The following is a non-profit fan fiction. I do not own Naruto, Tensura, The gamer and bunch of other stuff in this fan fiction. Please support the official release.》 Sincerely, Chair-kun
Rimuru back 3000 year as a Fifth True Dragon by EliteX0
22 parts Ongoing
During the Final Battle Against Feldway, he had inevitably sent Rimuru to the end of time and space. After Feldway send Rimuru to the end of time and space Rimuru decide to find a way to go back when he's wake up However, Chrono-Saltation, had not only thrown Rimuru to the end of time and space, but it had also locked him out from returning to the world using Space-Time Leap. As if banning Rimuru's existence itself from the world, preventing his return. And Ciel also tell him that his timeline had already destroyed so he cannot go back after hearing that Rimuru start to feel a lot of emotion inside him sadness regret and pain all the emotions you can think of come to him at once and start to make him go insane In the end, Ciel find a way to time travel to the past but risk is to high it can destroy rimuru's Spiritual body, if anything goes wrong. And so can rimuru go back in a time unharmed ? And what will be the consequences of it ? In this fan-fiction, Rimuru will be OP, respectful, serious when needed, and goofy. There will be other characters that will be more powerful than Rimuru at the start. (Keep in Mind, this is Fan-Fiction. So not everything here will be accurate and a lot of things will be changed.) All Rights Reserved
The Last Regret - That Time I got reincarnated as slime by IsTaz2
39 parts Complete
Rimuru achieved everything which was possible but there is one regret he has in his mind even after the 12 years of the great war that he cant save his 'Destined One' So after 12 year he Decided to clear this regret but he don't want to change the whole timeline by directly interfering so he decided to live the whole life again after being reincarnated but this time he has every skill from the moment he reincarnated. Note: I changed rimuru personality a little bit after ch4 , I made him act like evil sometimes. The story also started to change after ch4, You would only be spoiled the events and character names of ln. Thanks @VytsuDesigns for the cover.
Demon Lord Shinobi by Hadanuke
6 parts Ongoing Mature
This is a story of Rimuru going to a different universe to have fun and basically do the same thing he did in his previous world. Create a world where he and his people can live a good life. How will that work in the shinobi world? Will he able to create peace while being called the Demon Lord? This is a rewrite of my first story [Rimuru goes to the Shinobi world] This story will feature more thought out plot and better done story and hopefully less typos and better update schedule and a lot more though put into the direction of the plot so that It doesn't bite me in the ass like last time. I hope that you enjoy reading :) Also on a different note, the title pic isn't mine, I didn't draw it, AI did. Sorry to disappoint, you can deck me in the shnaz in the comments about it.
Re:zero x Rimuru by AzukoTEMPEST
13 parts Complete
Hello Readers, Welcome To, The world of Chaos and beauty Re:Zero x Rimuru Thank you for joing I hope you'll enjoy the story..To all the awesome people who are helping me to Improve. Thank you! I'm not that good of a writer but, I do enjoy it a lot. So, seeing people helping me really makes me happy I'm not a professional so you might find an insane amount of mistakes so please let me know so I can fix it I tried hard to make this story properly understandable.But as much as inexperienced I am...you guys are the judges. please give me some suggestions for improving the story. I don't know how to explain but,one thing for certain this story contain spoilers! Most of you must be thinking about how weird this description is but you see I'm not yet experienced to describe the story properly but, It's been 100,000,000 Year's world has Changed as well as our lovely slime. He has evolved into a being whose Rage could be The end of existence. Due,To boredom Rimuru decides To resign from being the king and wants To traveller the other worlds outside the veldanavas creation In process of doing So he found a place where Many species lived it was a world of Chaos and beauti Where elf's human's demons and whites lived due to Rimuru's admiration towards elf's he choses to stay there for a while. After he entered the world he meets a beautiful half elf and her friend puck. Will he able to make the elf's and the girls his own let's see what happens.. DISCLAIMER. This Rimuru Tempest Might have a different personality than the Rimuru we know the only thing changed in his personality is he's become more like veldora and milim childish.. This story also contains bad word's and sexual stuff..and yes i don't own any characters and also some of the image's
Rimuru the True Dragon Lord by ParadexTM
20 parts Complete Mature
Rimuru died what'll happen now ? Will he live his life again trying to survive and make a big line through Yuuki Plans? That's what Ciel planned .. but will it really happen? (That Time I Got Reincarnated as a Slime Fan Fic)
Enchanted || Diabru (Diablo x Rimuru) post great war by astro_chan418
10 parts Complete
"I'm gonna be Rimuru-sama's wife for sure!" shion said as she ran off to get a dress. "No I am!" shuna said as she too ran off. "In your pathetic dreams!" Testarossa exclaimed running off. "I'm going to marry rimuru!" milim said as the rest of the women, and even some men, ran off. Rimuru sighs deeply at the sight. He can believe that the bickering progressed this far, no shame really. post war, rimuru was living his life happily and freely after becoming a God. he was enjoying his day when all of a sudden, the girl's started bickering about who would be the one to marry him. not that it mattered to him, he only ever saw them as friends that he treasured the most than a romantic partner. to stop this commotion, benimaru suggested that they should host a ball to see who their master would pick. Rimuru thought this was a waste of time but agreed anyways for the sake that this would all stop. Little did he know of the new adventures he was about to encounter. Inspired by a Taylor swift song and I think yall know what song judging by the title. This story includes: -Lgbtq+ -harem (but the main ship is Diabru) -smut (maybe idk I haven't written one before but I read some) -jealousy -op characters
Ancient Gods Reboot - Prologue by DarkFighter_
20 parts Complete
A reboot of my previous fic 'Ancient Gods Reappear After 100,000 Years' with a completely different story. It does not matter if you have read my previous fic or not, you will have a completely new experience reading this. 7000 years have passed since the wars ended and the world has been living in peace and progressing. What will have if this peace gets disrupted? What will be the cost the world would have to pay?
[INDEF. HIATUS] Regrets and Wishes: One More Chance by jnscrtm
31 parts Complete
[IN INDEFINITE HIATUS: Read my profile bio for the summarized detail] Standing alone in the middle of nothingness, he opens his eyes. The world that he tried to protect has long been gone along with everyone whom he loves dearly, leaving only his first partner who has been accompanying him since the first days of his second life. With the new power he has acquired before the battle, he tries to go back in time. However, he ends up getting stuck into a far past, the day when he got reincarnated. Realizing that it happens because of his own selfish dream and desire, he decides to accept what has happened, to start everything all over again for one more chance, as if there would be no any others. Regrets and wishes are mixed into one as he embarks on his new journey together with his partner. Arc 1: Beginning of New Journey Arc (Ch. 1 ~ 15) Arc 2: Orc Lord Arc (Ch. 16 ~ ??) ~WARNING~ CAN BE VERY SLOW-PACED AT TIMES; major spoilers from mainly LN, anime, manga, and a little bit WN; Rimuru X Ciel straight ship. (READ AT YOUR OWN RISK!) ~DISCLAIMER~ This work is merely a fanfiction written by a fan of Tensura. All fanfics from where I got inspirations belong to their respective writers The original story of Tensura belongs to Fuse-sensei, so do canon characters ~~~~ Language : English Started : 11/29 2021 Status : indefinite hiatus since 09/01 2022 Latest upload : 08/03 2022 , 21:00 UTC+7 The image of my cover's background, the characters, etc. are mostly taken from Pinterest and Tensura fandom wiki.
Whispers of Affection: The Milim and Rimuru Love Story (Rewriten ) by Friris
25 parts Ongoing Mature
Hello! This is the rewritten version of the story. In this updated version, there will be several changes, including adjustments to the relationship between Rimuru and Milim, and at some point, the story will diverge significantly from the original light novel. Please excuse any errors in my English, as it's not my first language. If you notice any inaccuracies, such as errors regarding the kingship of certain countries, please leave a comment, and I'll make sure to correct them. Thank you for your understanding and feedback! Additionally, I will be evolving Raphael into Ciel quite rapidly, but Rimuru will not be progressing from Demon Lord to True Dragon at the same pace.
Rimuru the First Demon Lord by VioMC12
19 parts Ongoing Mature
In this story, rimuru has died but due to his wishes he went back in time and become a slime? now with his new found powers and skills, he strod off into the unknown and it seems he is not a normal slime but a demon slime? and he is the only SENTIENT BEING IN THIS REALM! Now surrounded by mindless demons, what will this slime do? Rimuru due to his strong if not stronger soul changes his gender into a male Instead of veldora, veldanava will be his 'sworn friend' since there are almost no other sentient beings other than a few Rimuru will also later evolve into a primordial instead of being one from the beginning. don't ask me how I don't know either Rimuru and ciel will also be with each other wayyy longer hence they become a bit 'EXTREMELY YANDERE ON EACH OTHER' uhmm a bit obsessive. also my first time writing a story + haven't read the light novel but kinda know the order and story to an extend + I'm a 6th grader so I don't know a lot of words I can use for my story to express my story BUT I hate spelling mistakes and will probably not make any but a few. I do not own the tensura series or light novel it belongs to fuze san(I think that's his name?) also if any one copies my story without my permission I WILL SEND YOU TO JESUS Taking inspiration is very much allowed
The ancient Demon Lord Rimuru by CriticalCraft
23 parts Ongoing Mature
More than 200 years have passed since the war between the Empire and the victory over Ivarage. Rimuru is currently sitting in his office, bored out of his mind. His loyal partner Ciel sees his situation and gets an idea that can solve Rimuru's boredom. Come along on your journey as Rimuru travels over 20,000 years into the past to become an ancient demon lord.
Tensura: Melting the Eternal Frost by JackDaWeb
51 parts Ongoing Mature
This story depicts an alternate timeline wherein Velzard attends Walpurgis after sensing Veldora's presence. She subsequently meets our protagonist and becomes interested in him after his display at the meeting. After thinking for a bit, she decides to move to Tempest and becomes a close ally of Rimuru. Rimuru and Velzard will sometimes be out of character since it's unavoidable. Our protagonist will be more rational and have an actual spine, while Velzard will not be as cold and ruthless as her canon counterpart. Besides, Velzard is missing a lot of characterization, so I decided to write my own interpretation of her personality based on the original light novel. I recommend at least having seen the second season of the anime since my story will pick up from there. This fanfic will follow the main story beats from the original light novel, meaning some arcs will get glossed over if there are little changes. I'm somewhat OC, so expect a lot of chapter edits or updates because I tend to reread chapters and notice minor mistakes here and there. Also, it goes without saying that I do not own the series 'That Time I Got Reincarnated As A Slime.' Check out and read the original light novel written by Fuse.
Looking for adventure, again, more, never stopping. Worlds.StoryANew by Sane_25
11 parts Ongoing Mature
Hey wait! before you ignore this! It is a good story, with better writing then what I have mostly seen on this site! I know it is not everyone's cup of tea but please try it. Also the quality in writing will increase with feedback and new chapter! Also I do not have a timeline chapter so I'ma give a basic idea of this: Part 1: Rimuru in Genshin till middle of liyue Ark Part 2: next world(mentioned when chapter releases) Part 3: Rimuru in 3rd world (mentioned when chapter comes out) Part 4: Rimuru back in genshin and because of time dialation it is only just after the liyue Ark finishes. Part 5: Rimuru goes back to finish what he was doing in the 2nd world(in the second world there was about a 3-5 year jump. Part 6: Rimuru checks the 3rd world, meets someone, falls in love with them as fate guides. Part 7: Rimuru summoned into another world after reading an odd book. Part 8: Back to genshin after the specified Ark finishes. Part 9: In the third world chasing a cat with a bow Part 10: back to genshin now at Fontaine. Now I might have more parts and what not but that is the gist and the parts do not reference chapters at all they are just a extremely generalized storyline that will slowly get revealed. Also for those who guess the reference please comment on a different story that I will set up as to not spoil it for others. Thank you (: Chapters will likely come out anywhere from a couple hours to 2-3 weeks as i can be a little lazy so don't expect a concrete schedule. Oh uh done the Liyue because i got bored got only one chapter and i am now working on the next chapter. Now please enjoy the story 👌👀👍
The slime and the witch family [Tensure X slime no Taoshite] by hypertrixdark
23 parts Ongoing Mature
It has been 15 years after his great fight against the evil of Ivaraj, Feldway, and Michael. Rimuru decided to go on a new adventure he left a parallel existence in his kingdom he felt like he was alone but had Ciel. But on his new adventure, he met a woman that caught his heart. His partner Ciel fully supports his master/husband because she already knows no one can replace her as Rimuru's first wife. Azusa is having a good time with her life but once she meets the man the love of her life everything changes for her let see how to is witch's adventures go and how she becomes a queen to a demon lord/dragon/god goes her slow relaxing life with him for almost 300 years she meets new friends and new family. Rimure x Azusa x Ciel This is my first ever story and I know there are some fics about these two together but I wanted to do that as well because they never tell more of Azusa's side. I will be watching the anime to tell Azuza's side of her story but I can't promise you that i will do all the episodes I have been killing slimes for last 300 years episodes chapters maybe skip 2 or 3 episodes. If you're a fan of those two together then this is fic for you.
TENSURA X ARIFURETA : Journeys by Diablo_Forever3000
14 parts Ongoing
Time line is set in 𝗔𝗙𝗧𝗘𝗥 𝗔𝗥𝗜𝗙𝗨𝗥𝗘𝗧𝗔 arc 𝗔𝘁 the 𝗘𝗻𝗱 of 𝗧𝗲𝗻𝘀𝘂𝗿𝗮 , When 𝐑𝐢𝐦𝐮𝐫𝐮 defeats Yukki and decides to go for a vacation. • This is an 𝐎𝐫𝐢𝐠𝐧𝐚𝐥 𝐅𝐚𝐧𝐟𝐢𝐜 . No CopyPaste-(ahem) Restart . •Except The images and Characters of Original Tensura and Arifureta. Everything in this fanfic is mine Idea . •Note : Neither Tensura nor Arifureta belongs to me . This is just a fanfic . Ranking #1 Kouki 8 April 2023 #1 Liliana 8 April 2023 #1 Shia 10 May 2023 #1 hajime. 15 July 2023 #1 Shizuku 11 Mar 2024 #1 Ciel 20 Mar 2024 (out of 6.83k stories) #1 Kaori. 30 Aug 2024 Other Rankings / Out of 1000+ Stories #5 chloeObell 8 Sept 2024 #10 Slime. 8 Sept 2024 #10 worldbuilding 8 Sept 2024 Long Run Rankings #1 kouki Since 2023 - 2 October 2024 Thanks for reading.. Hope u like it ..
Replacing Rimuru: A Multiverse story by akroszero
21 parts Ongoing Mature
Raj a average guy struggling with poverty and his life dies by the hands of some not important bastard. While bleeding to his death he wishes to be reincarnated as Rimuru and by some luck Voice if the World fulfills his wish. Good thing is that he had been given a second chance with the abilities of one of the most broken characters. Bad thing? He has reincarnated in MHA instead of Tensura while being nerfed slightly. Now, it's only his desire to get strong that will push through all obstacles in this two faced world of Heroes and Villains towards greatness. ... First World[Mha(Currently)] Second world[???] Third world[???] .... Disclaimer: The image on the cover isn't mine and if the creator of this image wishes for me to take it down then comment me with a review. [No harem] [Neutral Mc] [Overpowered Mc] [Tensura] [MHA] [Multiverse travelling]
(Old ver. Discontinued) A Dream in the Faraway Past by alen-sotiris
24 parts Complete Mature
Feldway finally had enough. He brought out his true body, crafted by Veldanava's hands, while Rimuru was distracted, fighting an enraged Milim under Regalia dominion Rimuru was unable to contact any of his subordinates Not even Ciel could have predicted what would have happened No one knew, that in the next moments, Feldway would make the greatest mistake of his life And definitely no one knew, the suffering that Rimuru Tempest would undergo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclaimer : This is the first fanfic I have ever written. So I have no idea how good or bad my writting is. This story is an old version. The rewrite is here : https://www.wattpad.com/story/339737470-a-dream-in-the-faraway-past-rewrite This is a Ciel x Rimuru story (Only true ship! Just kidding) This story has very slow pacing MASSIVE LIGHT NOVEL AND WEBNOVEL SPOILERS READ AT YOUR OWN RISK I obviously do not own Tensei shitara slime datta ken This is simply a fanfiction. Also, all of the fanfictions from which I inspired myself belong to their respective writers The original story of Tensei shitara slime datta ken belongs to Fuze-sensei Cover art : https://www.reddit.com/r/TenseiSlime/comments/xvbpoh/rimuru_and_raphael/ My discord server : https://discord.gg/XesR4HXSW8 A Discord Server in which I have a channel dedicated to my fanfic : https://discord.gg/PDsGW3QNEk
Rimuru's boredom and his regrets(Time Travel) Tensei Shitara Slime Datten Ken by Sakura-Arashi
15 parts Complete Mature
50 Years after the great tenma war Rimuru is in his office doing paperwork Rimuru being the ruler of the monster nation he's forced to do paperworks bored out of his mind he consult ciel on what to do she then suggest to travel back in time to fix all his mistake and get rid of his regrets GUARANTEED (SHIZU X RIMURU) Possibly (RIMURU X CIEL) (RIMURU X THE DEMONESS TRIO) (RIMUR X VELZARD AND VELGRYND) (RIMURI X RUMINAS) (RIMURU X CHLOE AND HINATA) THIS IS MY 1ST STORY SO IM SORRY IF ITS NOT TO YOUR LIKING TELL ME MY MISTAKES IN THE COMMENTS THANKSSS ⚠️WARNING⚠️ I DONT OWN TENSEI SHITARA SLIME DATTA KEN(THAT TIME I GOT REINCARNATED AS A SLIME)
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Slide 1 of 19
[BOOK 2] That Time I Traveled as a Demon Lord cover
Rimuru back 3000 year as a Fifth True Dragon cover
The Last Regret - That Time I got reincarnated as slime cover
Demon Lord Shinobi cover
Re:zero x Rimuru cover
Rimuru the True Dragon Lord cover
Enchanted || Diabru (Diablo x Rimuru) post great war cover
Ancient Gods Reboot - Prologue cover
[INDEF. HIATUS] Regrets and Wishes: One More Chance cover
Whispers of Affection: The Milim and Rimuru Love Story (Rewriten ) cover
Rimuru the First Demon Lord cover
The ancient Demon Lord Rimuru cover
Tensura: Melting the Eternal Frost cover
Looking for adventure, again, more, never stopping. Worlds.StoryANew cover
The slime and the witch family [Tensure X slime no Taoshite] cover
TENSURA X ARIFURETA : Journeys cover
Replacing Rimuru: A Multiverse story cover
(Old ver. Discontinued) A Dream in the Faraway Past cover
Rimuru's boredom and his regrets(Time Travel) Tensei Shitara Slime Datten Ken cover

[BOOK 2] That Time I Traveled as a Demon Lord

28 parts Complete

Sequel to "A demon in a Ninja world" Things to do: 1. Got reincarnated. ☑ 2. Got nerf'd. ☑ 3. Died. ☑ 4. Revive yer self on the other "other" World. ☑ Well, those are some plot twist for ya. The plot armor is just getting +∞ on Def. And now... My wife is a slime. Geez. Screw fire nation. My real nemesis was the "gender" benders all along. 《Warning. Major tensei shitara slime datta ken (tensura) spoilers》 Status: Completed Sequel: That time I travelled as a demon lord: Tenma War, That time I travelled as a demon lord: Ninja War Prequel: A Demon in a Ninja World. Highest rankings: #1 in genderbend 19/8/21 #1 in slime 2/9/21 #2 in sharingan 4/9/21 《DISCLAIMER》 《The following is a non-profit fan fiction. I do not own Naruto, Tensura, The gamer and bunch of other stuff in this fan fiction. Please support the official release.》 Sincerely, Chair-kun

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