In their final year of high school, best friends Aki and Minagi were inseparable, bonded by their shared ambitions. Aki, a gifted athlete, dreamed of becoming a professional football player, while Minagi, hailed as a genius, was expected to pursue a career in medicine. Their paths were shattered by a single incident when an accident on the school stairs led to Aki injuring himself while saving Minagi. This event not only ended Aki's hopes for a sports career but also filled Minagi with overwhelming guilt, causing him to abandon his own aspirations for the future.

Years later, the two men have drifted into separate, unfulfilling adult lives. Aki has inherited his grandfathers modest hair salon, while Minagi has set aside his interest in medicine to work as a popular and well-paid host in a nightclub. The lingering tension from their high school fallout remains unresolved, creating a palpable distance between them. Their fragile dynamic is upended when Minagi unexpectedly appears at Akis apartment, asking for a place to stay. Although hesitant, Aki agrees, and the two former friends begin living together in a tense cohabitation.

As they share the same space, their unresolved feelings and physical attraction resurface, leading to a series of intimate encounters. However, their relationship is plagued by a profound lack of honest communication. Aki believes he is simply the object of Minagi's casual flings, while Minagi, still carrying guilt, misinterprets Akis actions and remains unable to express his true romantic feelings. The narrative slowly unravels the secrets of their shared past, including the full details of the accident that changed everything, forcing them to confront whether their connection is based on mutual affection, lingering guilt, or a combination of both.

The story is anchored by the main characters: Aki, a stoic and brooding salon owner with a sharp exterior, and Minagi, a charismatic and seemingly carefree host who hides his deep regrets behind a bright smile. They are supported by Sarara, a perceptive mutual friend from high school who acts as a subtle but effective wingman, gently pushing the two men toward a resolution. The primary narrative arc follows their painful journey from estranged friends to lovers, focusing on the themes of abandoned dreams, personal guilt, and the struggle to communicate. A central arc details the rediscovery of the accident's emotional aftermath, while the concluding arc sees them finally articulate their feelings and redefine their lives and careers on their own terms, free from the burdens of the past. The complete single-volume story is notable for its realistic, messy depiction of adult relationships and includes explicit content.