You were very close with your brother's friend. You would always play games and meet up. But one day something happened. The day your brother came to stay, you woke up at night to drink water but heard a noise from a room. When you went to that room, you saw wi ha-joon with a knife in his hand killing someone. He ran to you and put his hand over your mouth to silence you because you were screaming.

"Don't make any noise."