When Y/N L/N collapses into a deep sleep after a long day at work, during a dream, he meets a large man who motions for him to enter a door. He wakes in the middle of a field small enough to drown in the folds of his own bedsheets and trapped in the nightmare realm of the Nowhere. Stripped of his adult body and authority-but not of his memories-he's the only "adult" mind among the scattered Lost Children. Monsters know the scent of an adult soul, and they are starving. To keep everyone alive, Y/N must learn the Nowhere's rules, outwit grotesque Residents, and become the father figure none of them ever had-while praying each sunrise doesn't return him to the real world alone.

It's the end of the world, the dead are cursed to walk, they fight for control of an island, and Y/N, a man who was left behind during the rapture, is the last living human left. Now Y/N wakes up on the beach of said island and finds himself in an unfamiliar environment where he must juggle his new family, finding his place in a world where he doesn't belong, the mafia princess herself crushing on him, and the fact that unlike everyone else: HE can actually DIE, which puts him at a distinct disadvantage with anyone who might come after him due to humans being targeted with prejudice. Why was he left behind? How is he still alive even after being in a coma for decades on a piece of drift wood? Can he help a family of undead gangsters find their place in the world? And how will he survive? Welcome to The Gaslight District - an island pulled from the sea, filled to the brim with immortal criminals, and gangsters. The denizens of this land have been cursed by god, and abandoned, left to rot, fester, scab, and peel for all of eternity, and where consequences don't matter unless you can't weasel your way out of them.

Y/n L/n has been living in diving shop known as "Grand Blue" that is owned by Toshio Kotegawa as he lives he ecounters some intresting people from a diving club named Peek-A-Boo. As Toshiro's nephew arrives things there will get even more crazy.

How would the troll increase if Iori have a twin brother? How would things change?