The love he has for his mother may be a little different from others. Kentaro realized this when he heard the voices of his father and mother working hard to have a baby. When he heard his mother Chisato's lewd cries, what rose up within him was not the joy of having a younger brother or sister, but jealousy towards his father. He couldn't bear the fact that his mother was filled with his father's sperm. Kentaro planned to pump his sperm into Chisato's vagina to expel his father's sperm. Chisato is confused when she finds out what her child wants, and violently rejects him. But at the same time, he was aware that only he, as her mother, could calm Kentaro's twisted desires.