Diabolus: Kikoku  

Diabolus 鬼哭, Diobolus: Wailings of a Restless Ghost, 디아볼로스 귀곡, Diabolus～鬼哭～

An entity appearing as an alluring man is assaulting numerous female pupils at a school. two learners find that the only way for this spirit to cease roaming our planet is by satisfying its yearning, prompting them to take direct action and lay it to rest finally.