Yoshino secretly adores Nozomi, a flight attendant who recently moved in next door. One day, the adult goods he ordered end up at Nozomi's house by mistake. Yoshino is devastated that his sexual preferences have been discovered by the man he likes, but Nozomi, frustrated with her husband who is often away from home, begins to play with his penis as a toy to release her sexual desires. He is led to ejaculation in various ways, and his body and Kokoro become immersed in increasingly extreme play. A week passes while Yoshino is put in a chastity belt and has his ejaculation controlled...