If you think that out of the three he's the only one that doesn't pretend or try to be something he isn't, he is the most sympathetic. On the other hand he's the one that set this whole sh** in motion, whatever the reason. It's pretty clear he has reasons beyond getting one up on a teacher and a fellow student, I'm waiting to see what those are.
Uh no, IDK what makes you think that I "think that out of the three he's the only one that doesn't pretend or try to be something he isn't". I wrote nothing along those lines. I don't see how "suspect he is deeply hurt and troubled" can even be taken to mean that. If anything the opposite. So I'm left wondering if you by accident replied to the wrong post?
Oh, sorry then. My mistake. That was me babbling out loud (it's a nasty habit I have). I was trying to say "I also agree with you that he's the most sympathetic guy because if you think that out of the three..." (not talking about you specifically, just about what people might think in general) etc etc. Then I sort of began thinking out loud the pros and cons of giving sympathy to this character. Sorry I confused you.
Oh that's alright, we all feel the squeeze of trying to express ourselves without taking too much space, and at the same time try to organize our thoughts into something coherent. I admit I was confused and couldn't tell whether you were arguing with me or agreeing. To be honest I'm not sure if I completely agree with myself, as in how much should we think of these characters remotely IRL terms? It is an erotic fantasy sort of manga, and I don't suppose that neither the plot nor characters are supposed to be very realistic.
This is the story of three messed up people; One teacher and two students. And frankly, I find myself faulting all of them, but I think the teacher most of all. And oddly, though I think Yamaguchi's actions are utterly dispicable, I also find him strangely the most sympathetic guy, as I suspect he is deeply hurt and troubled. Not that excuses anything.