Saka and Ikuo are married for the second year.Saka is recently having a call to discuss her friend that her husband hasn't had an invitation for the night, but her brother-in-law Kiyoshi, who has moved to the same apartment, asks her to get into a physical relationship.Though she thinks it's not right, Saka is swayed by her curiosity and Kiyoshi's forcefulness, and falls into a swamp of pleasure...
