Youtube has videos on installing Renpy games on Android with Joiplay. Find them using Internet Search Engines, for example with
site:youtube.com how to install Renpy games on Android
You might try adding Harem Hotel to that search term, but installation is about the same for all Renpy games.
Then try again following the instructions above on this page, under the heading “How to play on Android”.
There is a FAQ page in the Wiki.