Against Demons and Gods : Scion of Greyrat

An Mc with 2 lives in one treated like trash in second confined to a hospital, 3 personality traits an extreme good guy character, an extreme bad guy character, an anime-obsessed otaku reincarnates to well.......duh fiction of course.
Starting and subsequent worlds are decided after that novel may end or may follow to other worlds

Since a lot of people are confused so
Dudley - older twin - Mc of fanfiction - A person living his 3rd life
Rudeus - younger twin - Mc of original fiction - A person living his 2nd life

Tags-First Novel, Random release rate, Maybe shitty battle scenes, Comedy, Harem, Slice of life, Slow paced story, Story