All of that is already in the game. You can click the "i" button to see which level you are with each character and if they have another event ready or not. Going to their door should tell you what you need to do to get to that event if it doesn't just start the event there.
That sort of stuff is immersion breaking. It makes it feel way too much like a game than I want Harem Hotel to be. I understand if that's something you want but I don't think the game should tell you that there is an optional scene in an event because those optional scenes are designed to only be seen by people who want to see them. They don't appear early so it gives you plenty of time to build exhibitionism/submission/whatever points to see the content. For example, Android changing outfits without going into the changing room only occurs once you have the exhibitionist trait. It's never an important piece of dialogue or something you'll ever worry about missing unless you're specifically going for that content. But as I said, it should be designed to be unlocked by the time you want it to be unless you put it off.
This isn't really something I've been including in story events lately anyway. In most cases, stats will unlock sexual content that you have already seeked out. That's the goal anyway. Such as lust content.
All of that is already in the base game. I think it's literally impossible to miss. How have you not noticed the stats screen? Or that clicking " *Talk* " on a door will tell you what you need to do / buy in order to start the event? I'm sorry if this is coming off as dickish too, but it must be incredibly hard to miss these hints if you've ever been stuck.
If there is anywhere specific you can remember getting stuck I would love to look into that. It's definitely possible that the few times you were stuck were the few times a hint wasn't given.
When it is ready.
