Uchi no 3 Shimai is a show that doesn't need anything to happen. Three sisters bicker, eat breakfast, go to school, come home. The comedy lives in how they actually talk to each other, not in setups and punchlines. There's no arc, no crisis, no reason to keep watching except that you genuinely want to know what Fuu will say next, or how Suu will react, or whether Chii understands anything happening around her. This is what comfort television looks like when it stops trying to earn that label and just becomes your actual daily life for 102 episodes.
Three sisters, Fuu, Suu and Chii, fill their family's everyday life with a steady stream of small incidents, and their mother and father have grown used to handling whatever the girls get up to. The comedy comes from the ordinary rhythm of home life rather than big events. The source is Matsumoto Purittsu's semi-autobiographical gag cartoon, and the TV run lasts 102 episodes of slice-of-life humor about a household shaped by three lively children.