Hey, overall I think this is a very solid proof of concept that has potential for some meat. The art style/filter is probably gonna be a deal breaker to some, but I didn't mind it.
My main criticism right now would be the pacing of the scenes, and that include the sex ones.
I actually liked the introduction scenes, especially the one with the blind girl (I'm very bad at remember names, lmao), and the dialogue choice scenes as well.
The issue is that pacing and tone of these questions feel more like they'd be what the doctor would say after like... the third session in, and not what he'd say upon literally just meeting these people.
this could be intentional, to more or less show off the characters, but on the off-chance it isn't, I would suggest that these sessions should maybe take place over the course of a few days, with more introductory dialogues happening in the first, progressing to the more romantic/lovely-dove stuff in later ones.
The other pacing issue is the sex scenes. IMO they feel like they're jumping in right before they're about to finish. This would be immediately helped by the addition of a lead-in/foreplay segments, as well as some kind of short aftercare one. With the current sex scenes, I think some prose descriptions of what's happening between the characters would really help too, as right now it's primarily sound effects, noises, and dialogue, which doesn't help with the pacing.
Of course, additional images and the like would also help, but I really think it's primarily a writing issue for the pacing of the sex scenes right now.
Other then that, a solid start, one that I hope to see improve as time goes on.