Cupid no Itazura: Nijidama

A man who is still a virgin suffers from a rare condition that limits him to only seven sexual encounters in his lifetime. Once he uses all seven, he will permanently lose the ability to have an erection or ejaculate. He has already used two of his chances through masturbation, leaving him with five remaining. He must be careful not to waste any of these opportunities, yet he is eager to lose his virginity.