Aristro I haven't played your game yet, I just found it. But I'll play later.
But I wanted to say something, but please don't take it as a request or an order, it's more like a "proposal". So I would say don't limit yourself in things, like, I saw what you wrote about the harem possibility, I mean to do that shit, even if it's not your canon ending, but put something like a harem for degenerates like me who are unable to decide between beautiful girls... kkkkkkk ... OR, make the endings solo as you intend and put a possibility for a harem ending without narrowing things down with your story.
But of course, as I said if this is somehow compatible with the story you have to tell, but from what I understand, is compatible since we can chase all the girls in a single play, then the game kind of already is harem, may not have an ending "harem orgy", but kind of already is a harem.
And just for the record, just by not being the same 18-year-old kid who looks like he's 12 and has never seen an ass and when he finds one he goes into a trance and endless monologues about how awesome ass is, going to college, you already deserve an award.