Going after minors - even minors close to 18 - when you are 30+ does not suggest that you're a well-adjusted person. Even if he doesn't have some sort of medically diagnosable condition, he's not okay as a person. At best, he's manipulative. Blond guy had a couple scenes where he was enthusiastically proclaiming that "high school boys are the best!" and implied that seunghee wasn't the first high school boy he'd been interested in or had something with. Not to mention everything that happened when he mistook seungtaek for seunghee.
Just because he didn't try anything when seunghee tried to start something doesn't mean he wouldn't later. I wouldn't put it past him to be acting like that as a way to gain seunghee's trust. Seems to have worked on some readers at least...
I have written this before so i am sorry for repeating my self...
Seunghee is 16/17 yo, koreans measure age with a different system.
If someone sexual harass a child that makes the child uncomfortable then he has broken the law, according to Child welfare of korean law. With the term child they reffer to indivintuals younger than 18 yo (international age).
So the blondie committed a crime twice, first when he attacked seungtaek in the car and second when he send the dick pic to seungtaek (15 yo). That is why some people call him sick. He needs help from a psychiatrist.
When seunghee asked the question the blondie took his time before he answered. I personaly think he was thinking if seunghee was ready from the grooming. At that point he really was not. This post by mie is excellent:
http://www.mangago.zone/home/mangatopic/3642168/
Moreover, when he went outside the school and the way he tried to convince seunghee to follow him is ....sick.
Guys but you can't say he is a pedo... This is different, this is taste...I agree with you saying when an adult goes after a child it could suggest something wrong with the adult (and that's why even if I prefer older man since being 14 I try to stick with boys my age) but saying is sick or a pedo..I think it's too much, it's personal taste.. Seunghee loves to put women dresses, is he sick too? I don't think so.. Loving high school boys is not a crime too.. I thought throughout all the manwha S should have RUN away from him and don't trust him but this is a little too much (not talking about him, but you guys ) S is perfectly right reacting like that. And about the Korean laws..again, I'm not talking about that it about the characters reaction, I'm talking about the reaction of the comment section.. We are from different countries and we can judge from another perspective. I'm from Itqly, in my country there was a president who at 70 used to go with girls (18, 19 or 20 years old girls) so in our country the girls weren't minor, but that's far more sick in my opinion. We have tons of minor girls an boys here going with people 10 years older than them... I don't think age can say how much innocent you are (but S is indeed so innocent..even stupid sometimes, like when he trust strangers)
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Okay mate.
Wait why are you all saying that mister is sick?
The boy is 18, not a child for sure and we see many coupe in Real life with far more age difference. He didn't even try anything, even when the boy said he wanted to spend the night... So