I see you want to do an R-18 scene ...
I recommend that you take as a reference one of the best novels that I have read about character creation and personality development.
For the MC's kind of purpose / objective, I was sure he would hate the novel 😅
The name of the novel is "Stealing Spree".
It also has several scenes from R-18 that can help you, the most remarkable thing in my opinion is the construction of the world and the rhythm of writing that is perfect, without time skip.
It is a surprise to find good original novels on this web platform.
I hope and do not drop the novel, as it has a lot of potential, just like you as a writer, not many people bother to ask for opinions and advice.
So far i dont see eny problems yes the fight was simple but the guy is too op for her so i sai the it is ok 👌 so dont worry just keep writing how you been doing it and you’re been doing good work so far