I think it completely depends on your own outlook on ravishment etc, so best to start it and just go from there. There are a lot of extra scenes not in the manga etc so it's worth it in my opinion.
For me personally when it comes to their love scenes and relationship, I don't like Onodera too much as he seems a very selfish lover, leaving it all to Masamune all the time because he's essentially a coward - so Masamune can come across yes as forceful but I think it's just super obvious to him (and the rest of us) how Onodera feels, he just is too scaredy cat to admit it. I think Masamune is just acting in a way that shows his relief, longing, frustration and desire for Onodera - so you don't resent him as an attacker or anything like that…rather like many of us you may resent Onodera in being hella slow for admitting his love!
i've watched the anime, but haven't started the manga yet, in the anime masamune doesn't really seem rapey to me so much as a little forceful if that makes sense? Maybe persistent is a better word? Is it different in the manga? I know that Ritsu always says things that make it seem like he doesn't want the advances, but it always seemed like internally he did?