Michio

I don't think it's important, I think it was just a random fellow who is one of the higher ups, but jinwah used his name as a conversion

Well, we know his father cut his knot top, what I assume it's a very humiliating thing to do as a sign of dishonor or something like that even more if it's public. If the father humiliated his own son like this in public eyes, we can only imagine what would go in the house. It has be to about Seungho's sexuality... maybe the father tried to beat the gay out of him? Or even killed someone he cared about after catching them?
It's pretty clear Seungho hates his father and even the mention of him is distressing.

My goodness I missed this in the previous chapters or I just completely missed those information. I have to reread, I guess, but thank you for the explanation.

This is interesting. In which chapter they say his father cut his knot top? Thank you

It's in the very beginning I dont remember where but yea his dad did do that

I think it's the very first chapter, just after they met. It's Nakyum's remembering where he had heard of Seungho's before.
Around chapter 12 was the part where the old servant mentioning that he has served Seungho for ten years and still is afraid of him... that is very unstable and with violent mood swings because he has been badly hurt in the past. This is just after Seungho slapped NK thinking that he had ruined the painting on purpose and order to beat him up in the mat... but then changed his mind and send the servant to treat him.

I found it, Thank you!

Yes, it is the first chapter, thanks!