I gave it an 8 to be realistic, but this was one of my comfort mangas which I was reading as it was coming out so I appreciate it so much!
It has such an interesting, even fresh story, and I'd say it's more between shoujo and josei than strictly shoujo (and I really liked that!). It's got some hooottttt moments but everything is within the bounds of subtlety and decency.
The idea of a person transforming into a cat with kisses reminds me of Tokyo Mew Mew, even though I don't know where the idea actually originated from, I am just sharing my observation. The readers can find this idea for a story either weird or amusing, but, personally, I was really torn between those two. However, the characters won me over with their sweet relationship and everyday life.
This isn't one of the best stories I've ever read, it really isn't, but I think you can find comfort in it and it is a page turner, it's sweet, relatively short, lively, it gives you butterflies, it's overall very nice and you get good looking characters.
(One weird thing I came across is the appearance of that girl that's supposedly mc's cousin? Idk, if anyone can explain that part I'd be grateful, I don't wanna spoil the manga)