Wow, I'm in awe. A top who reflects his actions, not only after doing it, no, stopping midway and questioning himself. That's what I call a green flag !!
I am not sure if the flashback is right, junwoo might hallucinate some things or his mind is playing him tricks. I still think he himself killed his own father. Well, but still Guwon killed the doctor, just like that. I'm not sure how their relationship will get romantic again