They tell you one thing when you become a teacher: Leave your personal problems at home. Kim Namjoon's problem, however, is also in his workplace. The problem being none other than his coworker, housemate and best friend, Kim Seokjin. Namjoon's daily life consists of teaching English at Hiteu High School of the Arts for Healing. Among that, he resolves teenage drama and has to handle the teasing from his fellow teachers and students regarding his closeness to Seokjin. Every day he's telling everyone, and himself, that he's just a friend. Kim Seokjin has been only that since the day they've met.

Korea goes into an uproar when its announced that its faceless King, Kim Namjoon, likes men and only men. In an effort to get him married off, his grandmother holds a competition in which the winner will become the King's spouse. Korea's gay men gather to win over the King's heart, but from just one look Namjoon feels himself drawn to one particular candidate, Kim Seokjin.