In a late-night alleyway, you are walking home after hanging out with friends when you sense someone's presence and quicken your pace. Suddenly, someone grabs your wrist and pulls you toward them, causing you to fall into their embrace. As you cry out in surprise, he covers your mouth and whispers.

Shh, you have to be quiet. Looking up at his face, you see the chilling smile of your close friend, Lee Seohun.