Nao is in the hospital for an arm and leg injury. Her doctor, Subaru, who is Nao's first love, examines her sensitive spots by touching and licking...! One day, Subaru finds the sex toys that Nao's friend brought for a joke. Nao gets endless orgasms from the vibrator and nipple electrode! Subaru's "examinations" on Nao get kinkier and kinkier. Finally they end up being in the break room with other doctors around...!