Rouraku ~Ingi ni Ochiru~

Masakazu is a uni student. He lives in an apartment which is located near his university and other occupants are young ladies living there. One day, Reika gets drunk and comes to his room. He tries to push her back to her room but they sleep together that night.... One night, after they have an affair, Reika tells him that most of the occupants living in the apartment are sexually frustrated and she tempts him to do something to them. Masakazu starts to make a plan to ....