U.A.’s demon (KNY x BNHA crossover)


Seiji comes from the world where demons are an enemy to man kind.He was the twin brother of Shinobu Kocho,and the Poison Hashira of the Demon Slayer Corps.He devoted his life to find the demon who killed his elder sister ,and to killing Muzan Kibutsuji.But that dream comes to an end when the said demon king turns Seiji into a demon. Finishing his final battle ,he fell into a river.This was where he thought his story would end,but turns out, fate isn’t done with him yet.Walking into an empty abyss he hears a voice.Telling him it’s not over yet. He fall directly into the classroom of the 1-A Hero class, severely wounded and confused.As he progresses throughout this world, he feels an overwhelming power awakening inside of him.Which side will he end up in?

Age Rating:



How Seiji despise them.

Because of them his parents.


were dead.

He vowed to kill all of them, but never did he once think that he’d become one...

Continue Reading Next Chapter
Further Recommendations

Gazing stars: Simple plot but nicely written!

Sofiavergara: Its really relatable and cool

Tina: Loving the story so far

Fe Emma: This is a great love story with a happy ending! It tells us the big difference between a city life and a small community life! It's a great Christmas story!

Liz : I like this story but I like of them. I wish you could do one of the boys as they return and get back to life with mom and Dom. Them falling in love with a special girl or guy. I think with the way you write it would be amazing.

Andrea: Best book I have ever read pure bliss

pakattnikela21: Like every wordThe storyline And also the charactors

mrsbabear: I loved this series...no cheating, lots of respect and love.

More Recommendations

slc21225: Loved the story. Would like to know the name of book 2

Silvi18: Amazing and great characters and plot.

ayoooobroo: This is very real and relatable and I truly love that in the story's also everything a hopeless romantic could want lol good job, keep it up.

burnt2: Really easy read from start to finish. I was hooked and couldn’t put it down until the end. Looking forward to the second instalment.

Deleted User: The fact that the book ends before she even goes on the date/dinner is so frustrating. But Even though...I love your story and the rollercoasters it takes me on. 💚🖤🖤⚔☠😁☠⚔🖤🖤💚

About Us

Inkitt is the world’s first reader-powered publisher, providing a platform to discover hidden talents and turn them into globally successful authors. Write captivating stories, read enchanting novels, and we’ll publish the books our readers love most on our sister app, GALATEA and other formats.