ずっと飼ってたペットの猫がある日突然美少女に！みたいな展開はラノベとかでありそうなので、逆にずっと一緒だった彼女がある日突然猫になった場合の生活について考えてみました。

I always seems like that there are plots in light novels where "the pet you've always taken care of suddenly becomes a beautiful girl!" so I thought about the opposite where your girlfriend instead becomes a cat suddenly one day and the lifestyle that follows.