EN-DRAMA's first episode shows the seven boys reuniting on valentine's day. At a certain point, they start questioning each other about keeping secrets and end up agreeing to put their phones on the table in sight of everyone, a game that leads the episode.

The story goes back in time to show Jungwon's story with Eunjin.

Now it's time for Heeseung's relation with Eunjin.

Jay's story with Eunjin doesn't begin that well, will something change their relationship?

Will Jaeyun be able to handle his feelings when the girl he used to like appears again?

Park Sunghoon's used to being alone, will he accept Eunjin's wish to be part of the caligraphy club and with that, let her get close to him?

Sunoo's story with Eunjin starts at a convenience store, where they find out how similar they are to each other.

Ni-Ki hopes to find his one-in-a-lifetime encounter, will Eunjin be the one he's been waiting for?

Going back to the future, the boys decide it's time to reveal who got to confess to Eunjin.