Delivery health is Jun's only joy. When he calls for a delivery health girl named Miyabi, who resembles his homeroom teacher Rin, whom he had a crush on in his school days, it's actually Rin herself who shows up. Though Jun is surprised, he can't just let the woman he admires appear before him change... Their tongues entangled passionately, the stimulation penetrating his penis, the dreamlike moment, unable to resist the one-time ejaculation, Jun asks for an extension. Rin is found out by her family and is thinking of quitting delivery health, but her body is throbbing with desire...