Nine years ago, NONOZUMI Kanata shared her first kiss with a boy named Haruka during her vacation. Kanata has kept her fond memories of him close and always carries a photo of the encounter. With no company for her summer break, she decides to follow the address from the picture in hopes of finding Haruka. Though she's never traveled alone before, KASUKABE Kairi, a popular and charming peer from school, helps her avoid making wrong turns. Along their journey, Kanata turns to Kairi for support and divulges her mission. Kairi offers to aid in her quest. But if Kanata finds Haruka, will her love be returned? And what of Kairi, who has been by her side? The path to true love is never straightforward.