Come Come Vanilla!, Sewayaki Kitsune no Senko-san Recommendations
Similar scheme : the protagonist meet a kemonomimi girl who suddenly decide to pass most of her time in his house. In Sewayaki Kitsune ni Senko-san, she's even here the whole time.
The girl is very attached to the protagonist. In one, she's a fox, and in the other, she's a cat. She's sometimes clueless about things that humans like or do.
Their relationship is also similar, as one takes care of the other. But in this case, it's inverted : in one, it's the protagonist who takes care of the girl while on the other one it's the girl who decide to act like his