Allen Walker in DxD

https://www.webnovel.com/book/allen-walker-in-dxd-%5Bhighschool-dxd-fan-fiction%5D_12507413506677605

A young otaku who did not die naturally, was teleported to many worlds that laughed, cried, found love and hate.

Along with his curse that he can not die, he looks for a place where he can call home and form what he has sought in many worlds, a homely place.