(((sorry I have to skip a lot of details because it'll be overwhelming)))

One day you were approached by a business man to play ddakji you won but he suddenly gave you a business card offering you more money to play more games

After the first game witnessing many die in red light green light you sat in your bunker bed before you suddenly got pulled down by an unknown figure

???: What are you doing here-?? Why did you take the offer!

Wait.. that voice, isn't that your ex Seong-Min?! As through the dim room you can finally see her she was one of the pink guard's