Ten years ago, the balance of the seasons was broken. Now two girls set out to return spring to a frozen land.

The return of spring arouses painful memories and conflicting feelings in the Agent of Winter.

Hinagiku and Sakura go to stay with the Agent of Summer and stumble into a sisterly feud.

Insurgents attack the Agent of Summer's home. The two Guards fight back.

Hinagiku and Sakura approach the Village of Spring, recalling painful memories.

Sakura reflects on her reunion with Hinagiku and the challenges they overcame to begin their journey.

The young Agent of Autumn and her Guard go about their lives in a high-tech fortress.

In the aftermath of the latest attack, Rosei relives his past with Hinagiku and their violent separation.

Rosei resolves to take action and contacts Sakura, only to get the last response he expected.

Hinagiku recognizes Nadeshiko's kidnapper, and the newly united Agents finally identify their enemy.

Hinagiku and Sakura are waiting to meet the Winter duo at the Agency when the building comes under attack.

Ishihara holds Rosei and Itecho at gunpoint, revealing her own past and the full scope of Kasai's attack.

Ruri, Ayame, and Rindo face Kasai in a battle to get Nadeshiko back.

Hinagiku and Sakura confront Misuzu, and their pasts, head-on.