The protagonist, Akito, has entered university and begun living alone. The reason he started living alone was not so much out of a desire for independence but also because he felt awkward about having romantic feelings and sexual desires for his mother. She was promiscuous when it came to sex and chastity and gave birth to Akito at 19 but his father ran away from her... His mother was also single-handedly showering love on Akito and is cheerful, beautiful and popular with men due to her voluptuous figure. However, after failing with a man again today, his mother goes to Akito's house to be comforted. However, tonight she drank too much and in her drunken state, she turns to her son, Akito...