A daughter demands abstinence from her husband to ensure thick sperm on her ovulation day. Meanwhile, the son-in-law cannot suppress his daily horniness. The young couple's relationship has turned sour due to their conflicting views on making a baby. Wanting to mediate between the two as a mother-in-law, Tomoka comes up with a plan. That plan is to secretly help her son-in-law get off without her daughter knowing.
