So this is actually my first comment in general throught my few years of having an itch account and they are just some basic ideas that might help players. How about a quest book and or quest log as I did get confused a few times and have to randomly guess what character I have to proceed with to unlock another quest since there is no (at least from what I have seen and I could be 100% wrong) way to track certain quests. Also make some form of soft lock so that you have to get all the girls to a specific quest since what I did and prob shouldnt have done was focus on well wraths story and than kinda went too far into the story and there were a few characters still at quest tier one like eri and rin for example. I was somehow able to unlock violet but never got the quest for her to go to eris how since I am pretty sure that is quest tagged via eri.
But I am rambling so the main point is. Quest log system might be a good addition, and than forcing the player to meet specific checkpoints before being able to proceed with the wrath or any questline. Like get all girls to quest 3 before continuing, I guess a good example of that would be from the game AI Revolution. Where it will story lock the story until you get all girls to a specific part of their questline and once that is reached it will lock their questline and force the player to proceed the main story until a specific plot point is reached.
But do please let me know if I am over reaching or not as I am not well meh i cant put words down properly, guess this was my advice and just let me know if I was going too far with it or no.
-GrayWolf