To fulfill a son's desire to engage in sexual relations with a close relative, GOS staff take action. To deepen the relationship between mother and son, they conduct hidden camera surveillance to understand and verify the son's desires. During a massage, they secretly observe and touch the son's erection to gauge his emotions. In order to satisfy her son's wish, the mother resolves to entrust her body to the staff while they disguise their identities. At a hotel, she engages in sex for the first time in 30 years, reacting sensitively and repeatedly whispering that she's doing it for her son as she accepts his penis. Later, another person appears—her son in disguise—and the blindfolded mother embraces him without knowing the truth. Even after realizing it is her son, they continue making loving, passionate love, confirming their feelings for each other until reaching their climax.