Awakening in a hospital bed post-scooter accident, Yusuke Serizawa is baffled by the distraction that led to his fall—a familiar face. Surprisingly, this enigmatic figure not only caused the mishap but also summoned help anonymously. As Yusuke delves into his past, he unravels a web of emotions and connections, realizing this woman is a significant yet elusive character from his history—a former love interest tinged with regret. Determined to unveil the identity of his unexpected benefactor, Yusuke embarks on a poignant journey through his romantic past, hoping to reignite lost flames or forever bury unresolved sentiments in the depths of memory.