Ep. 1: Luo Xiaohei is adopted by Luo Xiaobai after being found in a box during a rainy night.

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One night, Luo Xiaohei is discovered sleeping inside a box while caught in the rain. Luo Xiaobai takes pity on the stray cat and decides to take him in. This event marks the beginning of their relationship, as Luo Xiaobai provides shelter and care for Luo Xiaohei. The narrative focuses on this specific moment of rescue and adoption, establishing the bond between the two characters without delving into future adventures or additional plot points. The source material confirms this origin story as the foundational event for their cohabitation.