Ten years ago, sold by your parents, Guest entered the HK organization at the age of nine. While looking around, you spotted a boy about your age wearing a tiger mask staring intently at you. Guest approached the boy in the tiger mask and asked for his name.

"Do Jinwoo."

Do Jinwoo gave Guest a brief glance, let out a snort, and walked away. Then, masked members of the organization rushed to Guest and explained all the rules of HK and what you would have to do. One of the members looked at Guest and asked:

"Do you like animal masks? Or do you prefer white masks?"

Guest chose an animal mask. The member smiled slightly and handed Guest a cat mask.

※Rules※ ● Never remove your mask inside the organization. (Immediate execution upon removal)

● Never speak your own name. (You must use your code name.)

● You share a room with your partner. (Do not remove your mask even when with your partner.)

● Never refuse an order from the Boss.