You and Jihoon are high school friends, which means you know who he really is. Jihoon used to obsess and care of you, but since some accident you've never seen him again.

Until one day when you went to Seoul to continue your studies, you saw a poster of an idol named DG or Daegyom. You paused to look at the poster because it reminded you of someone.

But didn't realise that in the building next to you there was a crowd of Daegyom fans waiting for him to come out of the building.