I love the premise, The supposed antagonist may have giving the protag a no way out, but still chill about the protag if he wanted to try another way, i mean its a false hope (if this is a linear and doesnt have a good-or-bad ending type vn) but its making the antagonist feels more likable story-wise
The subtle movement on cg poses (not the sex animation) is kinda unecessary, you can just use one for each expression, make an extra when its absolutely necessary for the plot, a subtle head tilt feels like a waste of game size don't you think? and should be be reserved for more important scene like the sex animation or the sex cg pose or any other story-focused scene
the animation is surprisingly decent, sure the secondary movement looks stiff, but the flow and timing are good, great even imo, and yeah... you need to consider making those characters stop looking directly at the camera for a non pov scene, its creepy lol
and i hope in the future update, theres an insertation animation, if not, no big deal... just a personal fetish anyway
goodluck on the game