I haven't seen the full raws, just some fragments from the newest chapters (not released here). Spoiler:
He was probably going for either of them, it seems he likes younger men? But from what I read he's after Haebom because he's cute and naive.
If the redhead has the ring, I think it's time to resurrect Sangwoo
Maybe at first his after haebom but remember he hired someone to investigate them?not sure though..maybe now his after taesung after knwing that his son of the ceo..or his after upon learning his gay.
My friend showed me the raws and I'm so confused rn I can't really tell whether the redhead is after Haebom or Taesung(〒﹏〒)