A group of guys at a welcome party for a pure and innocent freshman from the countryside play her while she sleeps. The victim is Koko (a first-year student) Anzu Koko.

A group of guys manipulate and exploit a naive freshman named Koko during a welcome party, taking advantage of her innocence and vulnerability. As the night progresses, they engage in explicit activities without her consent, highlighting a disturbing dynamic of power and exploitation. The story revolves around the central dramatic tension of Koko's exploitation and abuse by those she trusted.