Replying...
Intro. Kim Mingyu, one of NIS's agents receives a mission to impersonate a student in one of South Korea's most famous and rich schools, to investigate whether there is definitely the gold that the former and deceased president of Korea probably hid in that school that was once his old house that is now a super rich school, which lifts suspicions that probably the school principal and if he found the gold and if he found the gold and if the gold For your own greed and to have South Korea in your hands, getting anything you want. Mingyu has this mission of getting gold and giving to the government, where it is its place. With this, he needs to pretend to be just an ordinary student without lifting suspicions and revealing his true identity, but a teacher from his class called Yejin, is suspicious of his actions, raising accusations that he is not a student, precisely for his actions within the school and outside. Which leads Mingyu to fear his true identity.

The agent -kim mingyu

@Briana