What? Excuse me but, disgusted? Heena Noona is showing but worry and care to her younger brother. She doesn't trust Seungho with Na-Kyum, why would she knock? Picture it, a murderer is in a room with your loved one, would you knock before going there? I will point this out before you say anything similar to disagreement about the fact that Seungho is murderer. Heena Noona has seen the victim's blood, who threatened her? Seungho. Just like he said if he killed, no one would dare suspect him. But he mame it clear it was him. I do not know why i took the time to write this, perhaps it's because i'm a lesbian, but you're welcome. 