After school, Jun, Aizawa's childhood friend and a hot girl, naturally tumbled into his room. But Aizawa seemed particularly uneasy that day. He'd heard the momentous news that he "had a girlfriend." Hiding her fluttering heart, Jun declared, "To avoid being dumped by your girlfriend, I'll teach you how to have sex," and began her one-sided lecture. At first, there was zero contact; the actual techniques were entirely air kisses. Sixty seconds of air kissing, eye contact, hands on his waist… With each completed task, the techniques were gradually unlocked, until finally, penetration! But ejaculation was not allowed until "OK" was achieved! A hot girl's possessive, stunted penis-strengthening course!