Kuroha Yoitsuji, known for her reputed good luck that brings misfortune to those near her, finds herself exploited by the Yakuza leader who raised her. Seeking escape, she is saved mid-fall by Nijisuke Murokawa, a youth skeptical of luck's influence, believing in coincidences instead. With Nijisuke's resilience as a guide, Kuroha questions her strength as they embark on a journey alongside the enigmatic Hokuto. As she ponders her agency in a life dictated by others, Kuroha grapples with the possibility of seizing control over her destiny.