A Boys’ Love story where a popular student and a gloomy one become stepbrothers after their parents remarry—and their relationship slowly turns into romance.

After graduating from high school, stepbrothers Hinata and Mizuki became lovers and started living together. As time passes, Mizuki moves on to graduate school while Hinata begins his life as a working adult. However, stepping into different worlds gradually causes a rift to form between them. To make matters worse, the presence of Hinata's supervisor, Kyota Kamiki, begins to cast a shadow over their relationship. Though strict, Kamiki genuinely cares for his juniors, and Hinata finds his heart beginning to waver. Mizuki, meanwhile, does not miss the subtle change in him. ""Student"" and ""working adult"" — a small yet overwhelming divide rises between the two of them.