@Seju
I think it's started as a joke, seing this figure who used to have so much power over suha and being a top who didn't care about anything else than his pleasure but now he can't do that anymore and now he is the small in that game of roles. It was sorta revenge that siwoo has after seing soha suffer for so long.
now I think he will start to like it and I really expect some good development from here