College senior Yuuki Haiga has moved in with his boyfriend, Ryou Kanae, a former brothel worker who has since graduated and entered the workforce as an audio engineer. The story follows the couple as they navigate the practical realities of living together while managing the distinct pressures of their respective life stages. Kanae is kept busy by his demanding job, while Haiga spends his days uncertain about his future career path.

Noticing Haiga has been feeling down due to his unsuccessful job search and that they have not been on a date in a while, Kanae decides to take him out to cheer him up. However, their date goes awry when Kanae suddenly falls ill, forcing them to confront the fragility that can exist even in stable routines. As the seasons pass, the two continue to reaffirm their feelings for one another while balancing work, school, and the challenges of adult life. The first major narrative arc culminates in Haiga's final performance as a student, his graduation concert, which serves as an emotional milestone for both characters.

Following graduation, the second volume follows Haiga and Kanae as they take the next step in their relationship. Haiga brings Kanae to meet his parents, a visit that begins with some awkwardness but allows the two families to slowly grow closer. The story continues to explore how the pair establish their place in the world as they deepen their commitment to each other. The narrative focuses on their quiet, domestic life together and the ongoing work required to maintain a mature romantic partnership.