I've recently been looking for this series involving what appears to be a cat-like butler? I think it's a manga I read, but I can't recall the title.

I tried doing a category search of series that have both cats and butlers but they dont appear to be what I'm looking for.

What I remember was there was a cat-like butler with a very serious looking face that never changes. I think at one point the MC asks if he ever smiles or something.
Another scene I remember was they were at a beach or pool or something and the butler changed out of his clothes and was apparently like super buff underneath hahaha (and I think the MC said something like he was sensitive of his looks?)

I hope this was enough information @_@;