This is an au where the demons are mermans and mermaids, this is an xmale reader story, so don't comment anything like "I'm a female tho." etc. And the people from the demon slayer corps are staff members.

Su Cheng is a person who has transmigrated from Earth into the Douluo Dalu world. He is a young cultivator aiming to become the best of the best and studies alongside Tang San and Xiao Wu under Yu Xiaogang. He cultivates a lot, but to no avail. Eventually, his System activates when he becomes 11 years old. His Martial Spirit is a Mandala Snake that begins to evolve and change in mysterious ways. Will he be able to achieve his goals?

"The Hell!? Why am I underwater?" [System reboot] [Loading...] [I'm your ocean survival system, you are my servant] [Feed me points, and I'll show you the secrets of survival with the aid of body upgrades] "Oh for the love of..."

A person with a maybe miserable history died and got reincarnated into his faviorate manhwa with the worst condition possible

We all know the drill. Isekai'd into anime world. Gain new powers. Meet waifus. It was just a bit sudden, is all. Not that I'm complaining. Self Insert OC x Harem. [First 14 chapters undergoing rewrite.]

criss died when he was pushed in a horde of zombies by his comrades as a sacrifice and was torn into pieces while his so called friends ran away he then woke up again two weeks earlier before the apocalypse hit criss was so happy and determined to treat his only brother well in this life his brother died in his last life to protect him, he sacrificed himself to zombies so his little brother could live on even tho he knew his little brother hated her and treated her like dust still he protected him till the end and this he was reborn with before apocalypse with space ability and his ice and wood ability he tried his best to change his bad behavior to his brother and make a better world for him in apocalypse and a hellish one for those who cause his death what will happen when people from the future return to the past with the antidote while being chased by the future zombies

『Rescuing the World's Fate』【Haitus】 Because of a rare disease. He stayed inside the basement which also became his room for 18 years. And died unexpectedly because of an earthquake that squashed him to death and led him to a place of just darkness. he saw a bright light opening up and it shocked him when he saw many mythical creatures surrounding him. Many years passed by. He finally get to start his own adventure that he didn't get to do in his past life. Saying his farewell to the creatures who raised him. He starts to walk away from the forest and heads to the near kingdom. Only to find out that he got reincarnated into the cringe novel that he really hated so much. He thought that fate seems to be playing with him so he took the challenge and decided that he'll change the fate of this world. ----------------------- "My love... i finished getting rid of those damn organization's base on the mountain... Can i have my reward now?" 'I don't remember him being one of the casts so how is he--... nevermind..' he sighed as he let the man drag him into an empty room. 『CREDITS TO THE OWNER OF THE ART: @Chien_xx 』