Just before her senior, Yoshihiko, departed for university, Kana Orikura finally gathered the nerve to declare her affection for him. After sharing their inaugural kiss, they chose to begin a relationship—an ideal realized for Kana.
Yet since that instant, Kana and Yoshihiko have encountered difficulties in their partnership, leaving Kana feeling isolated and despondent. An unforeseen twist emerges when Shougo Hayakawa—the youthful, attractive instructor assigned to Kana's class—moves into her home! In the quiet of her bedroom, will Kana abandon Yoshihiko for this new rival, or stay faithful to the man who shared her first kiss?
