[Chijoku An (Azuma Riru)] Bedwetting brother needs a diaper

A mischievous older sister takes charge of her younger brother's daily routine after a nighttime accident. As she manages his needs and unexpected mishaps, the playful tension between her authoritative role and his vulnerable state creates a charming, domestic atmosphere. What begins as a simple task of changing a diaper turns into a series of unpredictable moments in their shared nursery life.