Alot to say but i will keep it short. Definitely one of the better h-games i played however it needs ton of work. For starters please get more ambient music,
-The retro music is really distracting. And each track should play based on the environment (track for boss, track for village, track for forest area, etc.). Right now it feels like playing some random playlist from youtube.
-Since you are using Godot I recommend to use the springbonesimulator3d, It adds alot to the breasts and other parts that jiggle.
-Alot of unncessary walking. In the first quest i had to walk to often between multiple npcs. Cut it down as much as you can. If the space between wasnt huge i wouldnt mind it.