Today marks Kyouya Sata's seventeenth birthday, yet Erika Shinohara appears to have overlooked her cherished boyfriend"s special occasion. Ayumi Sanda, Erika"s companion, seems oblivious as she requests Kyouya to guide her after classes. Behind the curtain, however, Erika is orchestrating a surprise at Kyouya"s flat and has tasked Ayumi with diverting his attention. Yet the plan falters when, outside Kyouya"s residence, an unfortunate mishap drives Erika into a blown frenzy—forcing Kyouya to seek a method to soothe eccentric partner while evening sky turns dusky, and he must find a way to calm her.
