I heard you like feedback, so you shall receive. First of all, I respect that you want to stick to your non-harem vision! I'd love to see a game that implements this concept well. However...
1. As a new player, I'm unsure how to approach this game. The convenient thing about harem games is that everything goes. You don't have to worry about infidelty too much because you can always sort it out eventually if you play your cards right. Also, they often have group sex later on in the story, which is popular. With this game however, I don't know how I should act. Should I really only flirt with one girl? Or with my top three girls? Would that already be too much? I'm scared to access "too much" of the game's content because it might backfire. More clarity would be nice.
2. If you really want to lock the player into one path only, 7 girls to choose from is too much. You're spreading yourself too thin. Also, it seems that some girls are a LOT more popular than others among the comunity which I find problematic. I'd say cut it down to 3/4 love interests and make each really fleshed out and likeable in their own right. But that's not something you can just change just like that, obviously.
3. The story doesn't hook me. Now, this might be a preference thing but I like it when there's a nice story that gives you a break from "dating" while still making you become more attached to the girls when they join you on your adventures. Some games focus exclusively on "dating", maybe that's what you're going for, but it wouldn't be for me. Also, having two parties in short succession looks like a writing sin, mix it up a bit!
4. The humor is more miss than hit. I like that you're trying, but most of the time it seems like low effort. The problem is less the joke itself but the delivery. Also, don't repeat jokes, you know the rule!
5. Who even is Falazio? I can't put my finger on it but his personality just confuses me. Maybe I'm going crazy.
That was a lot of negative feedback, but it's not all bad! The girls look great, music choice is excellent and I like that you're brave enough to try something new. But as it is right now, it's not a good game in my book. Not yet at least. I hope this helps, best of luck with your efforts!