BESTFRIEND or GIRLFRIEND?

For years, Lee Jeno and Yoo Karina were inseparable-childhood bestfriends, favorite person, and each other's safe place. Everyone thought they would end up together. But they never did.
Because Karina kept her feelings hidden...
and Jeno never realized that the girl who had always been beside him was already the one he could never lose.
Then Choi Winter came into his life.
Sweet, bright, and impossible not to love, Winter became Jeno's first official girlfriend-the girl who finally gave a title to the kind of love he thought he had always wanted.
And Karina?
She stayed.
She smiled.
She helped him love someone else...
even while her own heart quietly broke.
But when distance starts to grow, jealousy begins to bloom, and another man slowly enters Karina's life, Jeno is forced to face the truth he spent years ignoring-
Why does losing his bestfriend hurt more than losing his girlfriend?
Caught between the girl he chose... and the girl who had always been there, Jeno must answer the one question that could ruin everything:
Bestfriend or Girlfriend? Sino ang mas matimbang?