Quiet and unassuming Mei Tachibana is 16-years-old, but has spent her high school years without making friends or getting a boyfriend because of a childhood incident that left her believing that people will betray each other sooner or later. When she encounters a popular boy named Yamato Kurosawa he becomes interested in her, and it is through their tentative friendship and blossoming relationship that Mei ultimately begins to branch out and befriend others.