Atsushi, a son-in-law who was completely depressed by the fifth broken heart. Rika, a mother-in-law who was worried about such a situation, tries to teach a woman's body by sex in order to somehow regain her confidence. If you wear a condom, you may get pregnant and invite you to have sex with a light feeling. Rika, who seems to be completely uncomfortable even if she inserts it, hides her numbness and removes the condom.