Responses
Same, I am so curious who it is!
I think it’s a part of himself that he let go for Garam.
its kind of spoilers...
that's Heejae's past manager, who died (he left the professor after some kinda fight, i dont understand korean much). They did share some romantic feelings. I don't know if they dated (pretty sure they didn't, Garam's the first whom he loved as well dated). its currently ongoing in the current chapter around Chompton's first appearance.
So curious about the person who left the professor… was it his father? His teacher? Another student? A lover? So many questions!