Iori and Kenichi, who are married to each other and were classmates at high school, are excited about their first class reunion in a long time. Among the old friends who congratulate the couple on their marriage, there is one person who catches their eye... her ex-boyfriend Takahiro. Even though she knows it's wrong, she is drawn to the old man who whispers sweet words to her, and they end up falling into a forbidden relationship. A summer affair of an unfaithful wife who sweats and seeks a dick other than her husband many times.