All roles are performed by adults. Maki is delighted when her shy son Kazuya, who has long been bullied, brings home his childhood friend Junkichi. She does not know Junkichi is actually the ringleader tormenting her son and gradually lets him get closer. Raised by his father and possessed by an unhealthy fixation on mothers, Junkichi exploits her kindness and forces her down. Each hard stroke against the depths of her long-neglected pussy makes Maki climax. Her mind keeps rejecting him, but her body gradually becomes unable to contain the ache in her womb.