Kazuya, the introverted son who was bullied, brought home his playmate, Junkichi, making Tada Yuka unable to hide her joy. In reality, Junkichi was the mastermind behind the bullying, but Tada Yuka, unaware of this, drew closer to him. However… Junkichi, who was unusually attached to his mother due to his father-son relationship, became captivated by her gentleness and eventually slept with her. Tada Yuka's long-untouched inner walls experienced orgasm with each intense friction. She rationally rejected him, but her body gradually felt an unbearable discomfort in her uterus…