Majima and Sonoki once shared a budding, clumsy friendship despite running in different circles during high school. Now they are living separate lives at distant universities and have not spoken since graduation, yet both feel a persistent sense that something important is missing from their lives. Taking matters into his own hands, Sonoki pours his emotions into a heartfelt letter he swears will never be read, but his plans are upended when Majima unexpectedly receives it. This event forces the two young men to confront their unresolved feelings, the distance that has grown between them, and the potential for a new kind of connection.

The story picks up after the events of a prequel that followed their younger, more angsty high school days. The sequel explores the pair navigating the quiet maturity of young adulthood, dealing with serious aspects of life and societal prejudice as they try to move forward together. The two main characters are Majima and Sonoki, former classmates whose friendship has frayed after they went to different universities. The setting shifts between their separate campus lives, their shared past, and new spaces they occupy as they attempt to rekindle their bond. The central narrative arc begins with Sonoki’s unsent letter and follows the emotional aftermath and gradual rebuilding of their relationship. The manga was published digitally in English from 2019 to 2024.