Story cover for Demon Slime | Demon Slayer x Rimuru by TheFreshWaffles
Demon Slime | Demon Slayer x Rimuru
TheFreshWaffles
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    Reads 200,946
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    Parts 20
  • WpHistory
    Time 2h 46m
  • WpView
    Reads 200,946
  • WpVote
    Votes 6,120
  • WpPart
    Parts 20
  • WpHistory
    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
Table of contents

20 parts

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That time my wife and daughter from another timeline got a second chance by hypertrixdark
18 parts Complete Mature
In this story in another timeline, Rimuru Tempest found a way to save Shizue and things went well they got married and had a child. However, things did not have a happy ending he tries his best to protect them when the whole world is being destroyed and Rimuru and all the monsters try to save themselves with help from Elyun and Keval partly and some adventures to make a portal to another world/timeline. However, only two people could go in so Rimuru lets Shizue and his daughter go to new timelines where can live happily. However, it seems both mother and daughter landed in a timeline where Rimuru evolved into a demon lord trying to resurrect the dead of the monsters. Join both mother and daughter to enjoy their second chance but the one they call husband/Papa has become a demon lord in their new lives. Rimuru has a second chance with Shizue that he couldn't save in his timeline. Join them if they change the future and live peacefully and what new adventures await them. Ok, there are some fanfics out there where Rimuru saves Shizue and sends her daughter to a new timeline but, What if Shizue comes along with her and lands in Rimuru's evolution into a demon lord what happens then?
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)
Tensura: Melting the Eternal Frost by JackDaWeb
134 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.
Tensura - Beyond Expectations by Rimuru6360
43 parts Complete
A 15 year Otaku girl died while saving a lady from a robber, when she thought her life was over, she got reincarnated in Rimuru's body when he first reincarnated in the tensura world. Now follow Yuu (later named Rimuru) in her adventure. Tensura fanfiction, but an OP main character from the start, HOW!! Just read and find out. Note - This book is the continuation of Rimuru Journey. Note - English is a secondary language, so grammar and spelling mistakes are common. And I don't own "THAT TIME I GOT REINCARNATED AS A SLIME" I only own this fan fiction story.
Rimuru the sin of love (temporary break) by RimuruEdward6
43 parts Ongoing Mature
In this fanfic Rimuru did not survive in the tensura war and was reincarnated as a half angel princess and half demon and falls in love with a surten blond hare prince and have a big adventure Togerther. What challenges will they face. This story is based on the anime not the manga. It will take mostly place based on the anime's story but will not have the same plot structure. English is not my native language so sorry if I don't type it correctly. I do not own the anime but it falls under fare use.
Looking for adventure, again, more, never stopping. Worlds.StoryANew by Sane_25
14 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
29 parts Complete 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.
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
The Last Regret - That Time I got reincarnated as slime by IsTaz2
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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.
Ancient Gods Reboot - Prologue by DarkFighter_
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Slide 1 of 10
That time my wife and daughter from another timeline got a second chance cover
Rimuru's boredom and his regrets(Time Travel) Tensei Shitara Slime Datten Ken cover
Tensura: Melting the Eternal Frost cover
Tensura - Beyond Expectations cover
Rimuru the sin of love (temporary break) cover
Looking for adventure, again, more, never stopping. Worlds.StoryANew cover
The slime and the witch family [Tensure X slime no Taoshite] cover
Enchanted || Diabru (Diablo x Rimuru) post great war cover
The Last Regret - That Time I got reincarnated as slime cover
Ancient Gods Reboot - Prologue cover

That time my wife and daughter from another timeline got a second chance

18 parts Complete Mature

In this story in another timeline, Rimuru Tempest found a way to save Shizue and things went well they got married and had a child. However, things did not have a happy ending he tries his best to protect them when the whole world is being destroyed and Rimuru and all the monsters try to save themselves with help from Elyun and Keval partly and some adventures to make a portal to another world/timeline. However, only two people could go in so Rimuru lets Shizue and his daughter go to new timelines where can live happily. However, it seems both mother and daughter landed in a timeline where Rimuru evolved into a demon lord trying to resurrect the dead of the monsters. Join both mother and daughter to enjoy their second chance but the one they call husband/Papa has become a demon lord in their new lives. Rimuru has a second chance with Shizue that he couldn't save in his timeline. Join them if they change the future and live peacefully and what new adventures await them. Ok, there are some fanfics out there where Rimuru saves Shizue and sends her daughter to a new timeline but, What if Shizue comes along with her and lands in Rimuru's evolution into a demon lord what happens then?

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