A man is exposed as a virgin in class and mocked by the girl he admires. Desperate to have sex, he begs his childhood friend Matsuri, who is known for being promiscuous, to help him graduate from his virginity on his knees. Initially reluctant, she agrees when he says he has condoms. He manages to find an old condom of his father's and has his first sexual experience, but his clumsy thrusting breaks the old rubber, leading to unprotected sex. Overwhelmed by the pleasure of raw sex, he can't stop his accelerating thrusts, causing Matsuri to convulse in orgasm as he ejaculates inside her multiple times.
