"If you don't want to come that badly, then you have to control yourself." The gentle boyfriend makes his girlfriend feel good repeatedly until she's about to break... Koharu, who works at a hotel, loves her boyfriend, Rintaro Orisaka, dearly. The two grew close as children and started dating after Rinataro fulfilled his promise to return to Koharu after moving away. Rintaro always takes the lead with the inexperienced Koharu, even in the bedroom, and adores his loving girlfriend. However, when Koharu goes to help out at a new hotel opening, she bumps into... the real Rintaro? In a bizarre turn of events, it turns out she was actually dating his twin brother, Otaro! "I'll stop if you tell me you love me," he insists. With his true identity revealed, Otaro pounces with even greater strength than before…