Ep. 1: Nino's recurring space dream and a room swap with Kou lead to a marathon in Saitama.

Nino experiences recurring dreams of her parents departing in a spaceship. Noticing her sleepwalking into his apartment, Kou invites her to move in, but she misinterprets the offer and they exchange rooms instead. While inspecting her new space, Kou discovers a high-quality children's dress and becomes curious about her history. Later, while searching for a lost baseball upstream, Kou travels to the Saitama district and encounters an Amazon warrior. The group subsequently participates in a marathon race. Although Shiro is the clear favorite, he runs out of white powder and retreats before the finish line. However, he makes a surprising comeback to secure victory, while Hoshi and Kou finish the race in a close tie.

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