The story tells about Hashimoto Shun (voiced by Murata) who lives on an outlying island in Okinawa, and meets Chihua Shio (voiced by Matsuoka), a lonely high school student who lost her parents. The two teenagers become friends. In order to grow up quickly, Shio decides to leave the island, and the two gradually lose contact. Three years later, Shio appears in front of Shun again and boldly confesses her love.