When Junyeong was young, his mother passed away, and his father was too busy with work. So, Junyeong was practically raised by his older brother, Junwon. The two were closer and more loving than any other brothers, but when Junwon entered puberty, their relationship grew distant. The dynamic between the brothers, who had become little more than strangers, takes a dramatic turn during Junyeong's final year of high school..