The thing about this story is that it's very gritty and grounded, so even when we do manage to soften up Charlotte and show her she can not only trust the MC but even come to have feelings for him, I don't see how we could possibly make her OK with him doing things with Emma, Lucy, and Suzi, especially Emma. She already has a very negative opinion of men and will be the toughest nut to crack, but this really feels like it could end very badly if she finds out about the other girls, no matter how far her and the MC go in terms of a loving, romantic relationship.
Also, for a first time dev, I'd say these are pretty exceptional renders and they do what I really like in VNs which is to make the character very expressive by changing their expressions during different lines of dialogue rather than just use the same image to cover 20 lines of dialogue.