Saji, a college student who lives alone, meets Aina, a housewife, at a nearby tavern one day. After that, the two who met again by chance hit it off and decided to drink until morning at Zuoji's home. The relationship between the student and the married woman was unforgivable, but the relationship between the two deepened. And when Saji gave her the key, Aina began to go to Saji's house with a shopping bag in one hand when her husband went to work. And to distract the loneliness of not being dealt with by her husband, she spends a dense time ...