So this review is going to be either me ranting about ideas for a while or just a jumble mess. Anyways if you want the short answer:

Yes, it's a good start but I would like to see more. There definitely more branching pathways but more nevertheless.

Long Answer:

I see a lot of improvement that could be made here as the game is still in its infancy. As you said a lot more characters, locations, and branching storylines. What I intended to write here is not to try to dump my idea on how the finished product should look because 1 not my game and 2 it would be very rude. So I'll give you a couple of ideas and see if you like them or not: Choices being more expansive would help make the player more like they have control over the story, and you know make their experience enjoyable. So just having two options being; option A for the good ending or option B for the bad ending doesn't really bring a fun experience. More of reading the same story with different plot points. So maybe you can have unique choices depending on how you want to change the lives of these girls. So maybe for Hana if you choose the NTR route you can have a straight romance with her or you can help her be an Onlyfans streamer or just have the option to leave her alone with Ollie. Tiny choices could affect how the game continues as well lets say during sex with Hana you did it in public, and now moving on she likes to have sex in public. Character Customisation (for me at least) really brings a character alive. So maybe you can have a choice to get a tan or change your outfit to be more revealing. Hell, you can do the girls' outfits as well. Like, make Hana get piercings or wear a maid outfit. And finally, an overworld should tie this together or something other than reading to keep things on pace. I've encountered a lot of H-games where it's just constant reading to the point I eventually just start skipping text to get to the good part. (though you don't have to worry as most of these developers just love to write out every little thing that's happening in the scene.) A mini-game can help too, but something really needs to space out the reading time of this game, and that's pretty much it. 

P.S. I've been thinking about working on a project like this for a while and I have a copy of Renpy. So just shooting my shot here if you have a position available I would be glad to help. If not then I hope you have a nice day.