perhaps the love for my mother within me is a little different from others. Kentaro realized that when he heard the voices of his father and mother working hard to have children. When he heard his mother, Chisato's, lewd moans, what welled up was not the joy of having a younger sibling, but jealousy towards his father. He couldn't stand the thought of his mother's insides being filled with his father's sperm. Kentaro plans to pour his own sperm into Chisato's vagina and drive out his father's sperm. Chisato, who knew her son's feelings, was confused and vehemently refused. but on the other hand, she was also aware that only she, as a mother, could calm Kentaro's distorted desires.