Knife

Park Riyeon was just a rich girl walking towards a convenient store minding her own business when she left the store she suddenly hears a scream nearby. She was debating on 1. Keep on minding her business and leave or 2. Be brave and look for the scream of the girl who was in need of help. She chose Option 2 and ran fast as she could. She's about to meet her fate this point on.