If you're looking for manga similar to Neko-sensei Kuu to Kai ni Osowaru: Gussuri Suiminhou, you might like these titles.
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These are both lifestyle guides involving kitty protagonists giving life advice to their female owners. While Kuu to Kai teaches readers various methods of getting to sleep, Toto Noel is a more holistic homeopathic guide to recovery after illness.