About a senior high school girl in the year 2520 who travels back in time with her friend to correct the history erased by a cyber hacker through solving each mystery in the bugs placed by the hacker; viewers can also participate in real time by competing with the cast to solve the mysteries through the app "Smart News".
About a senior high school girl in the year 2520 who travels back in time with her friend to correct the history erased by a cyber hacker through solving each mystery in the bugs placed by the hacker; viewers can also participate in real time by competing with the cast to solve the mysteries through the app "Smart News".
About a senior high school girl in the year 2520 who travels back in time with her friend to correct the history erased
