One day, Mitsuki finds out that a boy in her class gets pleasure from his nipples, so she invites him over to her house and starts playing with his nipples. The stimulation was too much for the virgin boy, as he quickly climaxes after a nipple lick and handjob! As she performs cunnilingus on him and they play with each other's nipples, his virgin cock quickly gets hard. He inserts it into her shaved pussy, feels good to his heart's content, and successfully loses his virginity! From that day on, the two of them start playing with each other's nipples after school, in an empty classroom...