After getting married, wife Kaho lives with her husband and his brother-in-law Satoru. Satoru is a professional boxer but has been losing consecutively and has fallen into a slump. Kaho tries to encourage Satoru but is also troubled by her relationship with her husband… Eventually, the two start to heal each other's wounds by pressing their lips together. Knowing it's wrong, but remembering the joy of loving and being loved, Kaho can't stop the forbidden act, stealing kisses from Satoru when her husband isn't looking…
