Takami and Akira are childhood friends who took piano lessons together when they were little. Takami was a tomboy who grew up among four brothers, while Akira was a cute, quiet boy who was skilled in piano more so than Takami. They grew up like siblings -at least, that is how Takami felt. Years later, things began to change when Akira suddenly kisses and confesses his feelings for Takami. She is startled by Akira's unexpected affection and doesn't know how to react...until Takumi begins to realize that her feelings for Akira are beginning to change.