Formerly a three time back-to-back winner of the All-Japan Intercollegiate Road Cycling Championships, Matsumoto now spends his days doing bike deliveries to pay the bills. Just as he contemplates giving up cycling for the sake of his future, Matsumoto suddenly finds himself at the center of an unbelievable incident that forces him back onto his bike for a high-stakes chase. The protagonist is an ex-champion whose peak athletic years are behind him, now working a blue-collar job as a courier in what appears to be a modern Japanese urban setting.

The narrative, which is also known by the subtitle 100 days escape, follows this desperate flight where the protagonist must use his elite cycling skills not for competition or sport, but for survival. The story blends classic sports manga drama with elements of suspense and action, transforming public streets into a dangerous arena where Matsumotos past glory becomes his only asset in a life-or-death race against time. Key narrative arcs involve Matsumotos internal struggle between abandoning his cycling identity and being forced to rely on it, as well as the external conflict stemming from the mysterious incident that triggered his flight. Recurring antagonists or rival figures are implied through the action sequences, though the primary focus remains on Matsumotos solo journey and psychological pressure.