Lime was invited to come at her best friend Kai to attend his school's festival, Lime wouldn't come at first, she's too shy to see her long time crush Park ChanYeol, but being Kai's BFF and she wouldn't say no to him she came to the school. After that, Kai and his friends joined a survival game in a booth. Kai's friends formed two groups which consists of 4 members per group. Lime was not a member of any of the group, into Lime's dismay, she just decided to go home but the game master stopped her and gave her a special mission. What would that be?