Hikaru Kusakabe and Rihito Sajou are polar opposites; Kusakabe is a carefree and rebellious teen, while Sajou is a studious honor student who excels in academics. Despite their differences, Kusakabe offers to help Sajou improve his singing during a chorus festival rehearsal. This leads to them practicing together every day after school and developing romantic feelings for each other, despite their contrasting personalities.
As they navigate their last year of high school and the daunting prospect of deciding their future paths, Kusakabe and Sajou must navigate their own emotions and support each other in growing and understanding their feelings.