Mother Reiko's voice leaking from her parents' bedroom. Kousuke was dismayed by that too erotic voice. A friend said he was taken aback when he got a glimpse into his parent's sex life. However, an uncontrollable intense feeling rises up within me... The emotion is jealousy of her father, who is making her mother vomit. A monopoly desire to make her mother's affection her own. And it was a forbidden desire to fill her mother's vagina with her father's sperm with her own sperm.
