How can I fill the loneliness of Mother Chigusa...? Shingo has been thinking about this for a long time, but he finally found an answer today. After witnessing Chigusa's masturbation, Shingo became convinced that her loneliness stems from sexual frustration. Determined to comfort her, he decides to use his own body. However, when Shingo takes matters into his own hands, Chigusa is taken aback and struggles against him. But as she realizes it's just her son trying to be kind, she weakens her resistance and accepts their forbidden relationship.