Chidori High second-year Rintaro is a gentle soul, with a fierce face and an even fiercer reputation. Used to being judged by everyone around him, he finds himself thrown off balance when he meets the open-hearted Kaoruko, a girl who attends a rival school and should be his polar opposite in every way. But her genuine attitude slowly makes his walls crumble. Despite their growing relationship, the rivalry between the two schools becomes a deep chasm that may be hard to cross, especially after Kaoruko's best friend, Subaru Hoshina, finds out about their relationship...