With the Nine School Competition behind them, the students of First High scatter into summer break, and Tatsuya Shiba and his sister Miyuki join Erika Chiba, Honoka Mitsui and Shizuku Kitayama at the Kitayama family's holiday villa. The rest of the break splits into parallel stories. Shun Morisaki helps a girl named Rin and ends up running from whatever her secret has attracted, Amelia is caught in a family dispute that turns violent, and Masaki Ichijou comes down with a case of lovesickness that not even his friend Kichijouji can solve.