
I think the degree of how much it's wrong can be decided by the victim's reaction. Whether he can accept it or get traumatize by it.
That is if we are talking about being elastic, and my very personal opinion. Morally speaking, all of the things you said of course are wrong. But we are not talking about reality here and a story stays as it is. No one actually commits a crime.
Besides you can't even count how much horrible plots used to make a story(comic, novel, and movie) since forever.

Of course many mediums (comics, novels, movies) use horrible plots all the time, but isn’t the amount of plots of this nature in yaois especially overwhelming? Is it not the least bit concerning how many mangas use this type of “move” to begin the story or advance it?
I agree with you that the degree depends on the victim mostly. See, to me this would be sexual harassment bordering on assault - Grabbing someone by the hand, tossing them to the ground, pulling a dick out and masturbating in front of them while holding their hand in place. Thinking about it like this eerily remind me of the Harvey Weinstein case, and that was in itself to creepy to comprehend. Now I need to get that image out of my head.
And still, ofcourse I know this is just a story, and that is exactly why I’m willing to keep reading it.
I just thought it was interesting to know how different people feel about it, so I really do appreciate your comment!

You do have a point there... But I think my brain is the problem, for a story to click in my head it needs to be a little bit of everything, but the least one is being fluffy. Not to say I don’t have a manga or two that are all fluff.
I think I mostly appreciate well written mangas, doesn’t really matter how they start. Maybe I did jump the gun with this story. I was assuming it won’t be well written because I’ve seen this plot so many times before (and still read it almost every single time). But even while writing the original post I was hoping I was making silly assumptions and that’s exactly why I said I would still read it hoping I’d get roped in again.
I might just take your suggestion in a different direction and get more into the mature/psychological/gory mangas ( ̄∇ ̄")
So would you consider this sexual harassment, sexual assault, rape, all of the above? Since it’s obviously wrong, just what kind/degree of wrong is this? How many years would you say the seme gets for what he did?
I mean I’ll read it, to see if the mangaka can lure me back in, flip the story on me, or it’ll be another typical yaoi (which it probably would). I’ll give it a chance is what I’m saying...
Sometimes I just wanna smack my head against a wall with just how many yaoi mangas have these plots(/TДT)/
There are very few mangas that can mix the dark with the cuddly.