Kuroinu: Kedakaki Seijo wa Hakudaku ni Somaru Episode 3

In a dark, empty school building, Kiriko is bound and gagged, wearing only her underwear. In front of her, there are three men wearing masks. They tell her, “I want to see your body drown in pleasure, and your face contort in ecstacy.” These men

Three students are in a school late at night fighting supernatural enemies. As they are about to leave, they get attacked and trapped. Based off the Inyouchuu game.