Idk, but i don't think it's Jihwa because otherwise he wouldn't go to Nakyum the next day to interrogate him, Jihwa seemed clueless and thought they had sex when it's in fact only a handjob.
I think it's the shady hoe who tried to question Seungho in chapter 41. It's probably why he's so interested in their relationship, he's known for a while that SH has a crush on NK.
i think it's the servant jihwa sent to spy on Seungho, probably the reason why he was so upset the next day and confronted Nakyum. Seungho also pointed out the Jihwa sent "amateur spy" to snitch on him
Was it ever confirmed who walked on Seungho and Nakyum when he was giving him a handjob in ch 16? It's Inhun right?