Han So-ran, who doesn't have a single friend in the real world, her only true friend is 'ke-SORAN' who lives in Kwangya. One day, she accidentally encounters her ex-boyfriend who broke up with her by ghosting her four years ago, and he was living in the so-called "Analog Mode" as he does not use a smartphone or SNS. The secret that So-ran and ke-SORAN who lives in both Kwangya and the real world that cannot be told to Cha Do-kwang starts to be dug up.

• Lee Seung-gyu
• Kim Ji-woo
• Hur Hyun-jun