Hitotsu Yane no Shita no

High-school freshman Kyuuta enrolls at his childhood friend Ririko’s school to fulfill their promise to marry when they grow up. The two have been apart since elementary school, and the school is a former all-girls private academy for wealthy students that has only recently begun admitting boys. When Kyuuta meets Ririko again, he discovers that he must live in the girls’ dormitory, where she is the dorm head. Even more puzzling, Ririko does not seem to remember him. Kyuuta must figure out how he can keep their childhood promise under these circumstances.