Hey, uh… is this game support iOS?
There's an app called "Spark - Ren'Py Novels" on iOS which lets you play windows/linux/android renpy games. It costs $8 and although I haven't personally tried running Harem Hotel with it, I have run other renpy games from itch successfully. All you need to do is download the zip for the windows game into you iphone or ipads downloads, and then use the app to play it. It's pretty easy to use, and the app's developer is active on discord for support.