It's a lot because there is no choice, usually you have to ability to not be a crazy prev, and yes I know it's taboo but taboo vs illegal are two very different things. I don't codon any form of abuse from almost any game. Just because he has feeling doesn't justify how she acts. Having it being a more healthy relationship could tell a great story.
Recognizing abuse is not always easy, the beach seen with the sunscreen is what truly through me off, where it went from more light hearted to way to much, she went past his boundaries then started blaming him for what happened, that is gaslighting and victim blaming. She knows that she has power over him and uses it to get what she wants, that is abuse.
I don't mind taboo there's a lot of games I enjoy that have consensual non consent and other degeneracy but having no choice just makes it read like it's all her doing instead of us the reader/player.
As for "being forced to take the initiative" that is ok in a relationship but that isn't this. Knowing that you have the lead in this you have to make sure that the other person is always ok, communication is key in any relationship. You have to be the bigger person and be welcoming to the other not forcing them.
I don't expect people to like this opinion but morally I can't stand watching someone being gaslit and abused, someone who's shy isn't denying their feelings they might just take longer to accept them, it's ok to take your time.
Overall it's not a slow build it took place over a few days. I never said it's ok for a male to do it I brought this up because any abuse is not ok and male sexual abuse goes heavily unreported. It's not that I hate all the taboo stuff, it's how the story is written, it's someone clearly breaking boundaries in what is a very serious game. A lot of other VN's get away with it for me anyway because they're not meant to be taken seriously, this wants to be.