I really like the art style and animations for the NPC. If I ever did a 3D game, I'd have to look into that style myself. (Incidentally, how long does it take to make a 3D model of this complexity? I never had the patience to model in detail, so it's not something I'm familiar with the timeframe of.)
The one thing that looks a bit odd to me is the band around the elbows for both characters. It looks like they're meant to be shadows built-in to the texture, but since there are unshaded parts between the bands and the clothing for some animations it looks like a glitch. I don't know how easy that would be to fix, especially if the characters are pieced together from multiple sub-models during runtime (like one game I modded once), but I figured I'd point it out. Then again, you probably already noticed it yourself...
A question I have about the gameplay: Based on the introduction information, it sounds like you have to raise "affection" before you can actually hold the NPC's hand. How do you raise affection? Are there interactions besides simply moving the hand?