Nee, Chanto Shiyou Yo!

Raised surrounded by six older sisters, Kuuya Hiiragi was sent away to live with distant relatives when his adoptive father worried the sisters would spoil him rotten. Years later, Kuuya comes back, and the household he left behind is exactly as chaotic as he remembers. There's Hinano, the eldest, who looks so young people mistake her for a kid and absolutely hates it. Kaname, a sharp-tongued lawyer with a reputation for being ice-cold in court — and also Kuuya's long-held first love. Serori, half-European, who looks mature but acts like the youngest person in the room. Tomoe, Takane, and Umi round out the group, each with their own way of pulling Kuuya back into the family dynamic he's been away from for years. The early episodes are mostly about that reintegration — the awkwardness, the unresolved feelings, the sheer density of personalities under one roof. It's based on a visual novel by Candy Soft, and that origin shows in how much attention each sister gets as a distinct character rather than background noise. If you've watched Aneimo or Ane Koi and liked the sibling-relationship framing, this hits similar territory. Fans of Oni Chichi who want something with a bit more setup and character variety before things escalate will probably find the pacing here more comfortable. Five episodes, 2005, Studio 9 Maiami — short enough to finish in one sitting.