I'm drowning in an affair with my husband's student, who is as old as my parents and children...

His student, Kojima, visits his husband Satoshi, who was a teacher, to report his marriage. Satoshi, who is happy about getting married, is so happy that he gets drunk, and in the living room Satoshi's wife Ryo and Kojima are alone... Kojima, a marriage blue, is attracted by Ryo's tolerance and involuntarily pushes her down. Ryo also forgives his body because he is exhilarated when he is touched by a man other than his husband for the first time... Sex with young people who are as old as their parents and children is stimulating, and even though Ryo knows that it's not good, he can't refuse, so he continues to work on his body over and over again...