"Spring Snow" is a manga adaptation of Yukio Mishima's novel of the same name, set in early 20th-century Japan during the Taishō era. The story revolves around the tumultuous relationship between Kiyoaki Matsugae, the son of a wealthy aristocratic family, and Satoko Ayakura, the daughter of a noble family. Kiyoaki, raised in privilege but emotionally distant, struggles with his feelings for Satoko, whom he has known since childhood. Their relationship is complicated by societal expectations, family pressures, and Kiyoaki's own indecisiveness.

Satoko becomes engaged to a royal prince, a match arranged by her family to secure their social standing. Despite her engagement, Kiyoaki and Satoko begin a secret affair, driven by passion and defiance of the rigid class structures of their time. Their relationship is further strained by the involvement of Kiyoaki's close friend, Shigekuni Honda, who serves as a confidant and observer of their emotional turmoil. Honda, a law student with a rational and philosophical outlook, often provides a counterpoint to Kiyoaki's impulsive and romantic nature.

As the affair intensifies, Satoko becomes pregnant, leading to a scandal that threatens both families' reputations. The situation forces Kiyoaki to confront his own weaknesses and the consequences of his actions. Satoko, facing societal condemnation, is sent to a convent to avoid further disgrace. Kiyoaki, consumed by guilt and longing, embarks on a desperate journey to reclaim her, but his efforts are ultimately futile. The story concludes with a tragic resolution, highlighting the destructive power of love, pride, and societal constraints.

The narrative explores themes of class, tradition, and the clash between individual desires and societal expectations. Kiyoaki's internal conflict and Satoko's resilience are central to the story, while Honda's perspective provides a reflective lens on the events. The manga captures the emotional intensity and historical context of Mishima's original work, presenting a poignant and tragic tale of love and loss in a rapidly changing Japan.