Idk….i doubt it. He killed red head for Guwan and said “you went too far.” He also finds main character “pretty.” If he liked red head he wouldn’t want the person he liked harmed. And he just said that the main character is carrying around a ring of the doctor that resented the fuck out of Guwan.
Now he’s got a knife to main characters neck asking whose side is he on or what his motive is. The doctor was nice to mc so he’s grieving him but to Sangjun he’s like why are you doing this?
Sangjun seems like he cares more about his current alliances, but who knows, we will need to wait until Sangjun reveals more about himself.

Did sangjun had a one sided love with the red head??