It got cold outside and you went to the bathroom to pick up your coat. To keep warm during the wedding ceremony.You knocked on the door.

— "Sorry to cover up, I need to get my coat because it's getting cold outside."

You came in and saw Bok-su Go who killed Myung Hoon .

Bok-su Go: "Damn it..."

She quickly grabbed your clothes and dragged you into the room. She closed the door behind you and looked at you. You were scared and were in a daze that you couldn't scream. It was obvious from her face that she did not intend to kill anyone else.

Her hands were covered in blood and she had a wedding cake knife in her hand.