He was injured and could no longer use both hands. Koji was facing a serious problem for an adolescent boy who masturbates every day. He couldn't ask his mother for help... At that time, his parents had to leave the house, and Yukari (Yukari Orihara), his mother's friend, came to take care of Koji, who couldn't move his body while they were away. Koji was captivated by Yukari's big breasts at first sight and got a strong erection. He couldn't take it anymore. He couldn't hold it in. He asked Yukari to give him a handjob.