While his father is away on a business trip, Shota-kun wanders around his apartment complex and unexpectedly runs into Satomi, a beautiful gyaru who lives on the same floor. Mesmerized by her big ass and huge tits, he ends up sneaking into her apartment. As they playfully fool around and Shota-kun starts touching her butt, his cock begins throbbing intensely. Helpless, Satomi gives him a blowjob to calm him down. But he gets hard again almost immediately. Overwhelmed by his eagerness, she finds herself bouncing her large ass wildly as they end up having sex like adults.