Parallel Paradise Vol. 12 (manga)

Yota has learned the horrifying truth about the Jealous God's true nature: it's his childhood friend and first love, Nishina! Awakening the Jealous God means annihilation, but Yota can't just leave Nishina in a coma. The world stands on the brink of destruction, and now Nakuta, Kazuchi, and the others must band together to fight for their world's existence in case Yota is making a terrible mistake!