I know you probably get inundated with requests, so I really don't want you to see this as an entitled demand or complaint, but I also think the immersion and the hotness of the game would benefit from more places to grab/kiss/pet, like her tummy, her inner thighs, choking her neck (like playfully/lightly, not like angrily or to hurt her), spanking her, etc. Also, it really feels like there should be more lines and reactions for stuff like kissing her. I feel like that's just such an intimate gesture that she should have something to say about it or want you to do it more. I like how she occasionally takes charge in sex encounters and find it really compelling when she takes agency and expresses desire/horniness to the extent of her actually taking charge. In short, I love this game a lot and think that the next step to make it even more erotic and addicting is to really up the interactivity in the sex scenes and give her more reactions. Make it even more apparent that she feels pleasure and wants you. NEEDS you.
Also I think you should be able to play with her tits in bed. Maybe add a paizuri scene sometime too?