I found this on Newgrounds, which led me to your Patreon, which led me here! So I'll leave a review here, since itch.io is something I check more often. Which surprises me on how I missed this, but perhaps it wasn't in my usual newest erotic category for some reason.
Anyway! It's a pretty normal strip rock paper scissors set-up really. Mizuru has some dialogue for winning and losing, which makes it better then just an image collection. That and losing is actually possible.
But that aside, there isn't anything much else to add. There's only 1 variation of each dialogue for Mizuru losing, and only about 4 different random ones she has for winning. The dialogue doesn't change at all depending on her state of dress or the player's state of dress. There isn't even any real acknowledgement if Mizuru is even having the player undress, or simply letting them get a number of defeats before she decides to stop playing or something.
The bonus scene at the end for winning isn't that bad. All in all, I'd say this is fairly decent. It's pretty lacking in content to justify frequent replays or anything though.