
You could turn this statemen the other way around; If you don't want to be asked to quit sex work then don't get in a relationship with someone who has feelings for you.
I don't think mc was unreasonable here. He's not demanding anything, he's just telling ml that he's struggling and wants to discuss his sex work.
Ml is the one getting all angry and defensive, which is his prerogative ofc, but it does not help the situation at all. One of them has to give in or they should call off the relationship. It's not healthy as it is

Don't think you really got my point, but whatever.
He's asking, not demanding. He's asking why he can't quit because he realises this is something he struggles with. Communication is the most important thing in a relationship, and you should be able to discuss your insecurities with your partner.
Not saying one of them is right and the other is wrong here, but it is a bit unfair to say Yoo-gon is doing nothing wrong.
If you dont want your partner to be a sex worker DONT DATE A SEX WORKER.
I haaaaate when they start dating and want the other person to quit their job.