Hikaru Kusakabe is a typical teenager; he plays in a band, smokes, attends parties, and makes the most of his youth. His classmate Rihito Sajou, however, is his complete opposite; Rihito is an honor student who consistently ranks at the top of the class and achieved a perfect score on his high school entrance exam. During rehearsals for a chorus festival, Kusakabe notices that Sajou is not singing and offers to help him practice. They begin meeting every day after school to train. As a result, despite their completely different personalities, the two boys start growing closer and developing feelings for each other. Under the pressure of their final year of high school, students face the looming decision regarding their futures. Along the way, these two boys must learn to understand their own feelings, all while supporting each other and growing together.