Youjuu Kekkai ~In'yoku ni Ugomeku Shokushu~

Synopsis

A shy student, Yu Tachibana. He grew up in a wealthy family but couldn't make friends, and was lonely and bullie from a young age. Lacking self-confidence, one day he finds an old air-raid shelter in the forest. Unable to find his place anywhere, he restored the air-raid shelter to make it his own. Being there lifts his spirits, and Yuu gradually changes into a more quirky personality.

"This forest is filled with some kind of power."

By the time he realized that, his body had collapsed and deformed.

Yuu, now a monster, seeks revenge on his bully, Kihara, and eventually kidnaps his childhood friend Nanako Takakari to satisfy his bloated sexual desire...