ネコの掟 (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Cats have a secret. They can really walk on two legs and speak human language normally. But when humans find out, terrible things happen. The three cats, Hoshi, Fuu, and Yuki, also follow their "code" and spend happy days with their grandmother who lives in the countryside. One day, however, the grandmother falls and loses consciousness. In order to protect their peaceful life with their grandmother, the cats finally break the Code!

(Translator: DeepL)