that's what i thought also, hawoon doesnt like being touch is a good evidence for him being traumatized from his past. also, you could see from the last chapter where the secretary regretting for not doing anything, there's a panel of her facing back and hawoon's brother harassing him.
QUESTION, possible spoiler (?
They don't explicitly say it but did ha-woon's sexually abused him? What do you think/ did you understand?