Guest Stars Kwon Yoo-joon as Masked Front Man Stand-in Jeon Young Soo voices Game Guide Kim Byung Chul as Instructions Guard Yoon Young Kyun as Player 040 Kwak Ja Hyung as Player 278 Kim Dong Won as Player 303 Kim Yoon as Hwang Jun-ho Stand-in Yoon Seung Hoon as Park Ju-un Yoon Don Sun as No Sang-hun Park Jong Beom as Guard 28 Stand-in Hyun Jin as Player 209 Lee Jung Joon as Revealed Guard Choi Jun Seok as Mask Scan Guard Park Geon Ryul as Toilet Guard Na Dae Heum as Deck Manager
