다음 중:I cant believe my mother makes such a sound... The lewd voice of her mother, Natsumi, echoes from the bedroom of her parents, who are planning to have a baby. When she discovers a side of Natsumi as a woman that she had never known before, an uncontrollable emotion wells up within Keita. It is her jealousy towards her father who is thrusting his cock into her mothers body. A sense of rivalry towards a brother she has never met who will monopolize her mothers affection. Mom is mine. She doesnt want to give it to anyone... Keita executes a plan to monopolize his mothers affection. It was to overwrite her fathers semen that was injected into Natsumis uterus with her own semen...