Thing is I think he's a sadist rather than a masochist, maybe incheol recently awakened those feelings in him
Some people are into both sadism and masochism (switches).
If that was the case then it's quite poor writing, since I didn't notice those emotions within him getting awakened.
Switch may be more about sub/dom tho, maybe sadomasochist is more fitting (enjoy inflicting and receiving pain)
U didnt notice it when he grabbed incheols tie to suck his dick deeper n held him in that position? I think its quite obvious it was portrayed in a subtle way not a loud and verbal "i think im a sadist now" or he could've had those traits before and were just seeing that side now
He is maso then has fun in seeing Incheol in pain? Boy it was so uncomfortable to read. Didn't even stop when Incheol vomited... That really made my skin crawl. Nah, it should be Pyeonghwa in vomiting state if he's truly a maso