The girl Naruse Shun (voiced by Minase Inori) has a childhood that is too painful to look back on. Once, she was young and ignorant, which led to the tragedy of her family because of her outspokenness, and she herself was sealed with words and could no longer speak. Such Shun lives in sadness all day long, keeping a distance from everyone and tightly closing her heart. One day, the confused boy Sakagami Takumi (voiced by Uchiyama Koki), Tasaki Daiki (voiced by Hosoya Yoshimasa) who was unable to fulfill his baseball dream due to injury, the cheerleader Nito Nazuki (voiced by Amamiya Sora) who was deeply in distressed love, and Shun, these four were appointed by the teacher to form a "regional communication exchange meeting". They were to perform a musical at the exchange meeting, but most of the students in the class were not interested in it. In the midst of a dispute, Shun suddenly spoke up and took on the task of singing.