Highschool Sweethearts

Highschool sweethearts, that was what Kim Taehyung and Jeon Jeongguk once were. When one abandons the other to pursue their career, one is left behind with a broken heart.

Fast forward to the present, Jeon Jeongguk is now a successful soloist. Albeit his dreams have now come true, he continues to feel this lingering regret and emptiness inside him.

On the otherhand, Kim Taehyung decides to be independent and to be selfish for once. Soon, he befriends Park Jimin and Kim Seokjin, only to then find out that the two are die-hard fans of his ex, yet Taehyung chooses not to tell them about his past relationship with the idol.

When the idol's birthday concert is announced, Taehyung's two bestfriends drag him along to the concert, leading for his and his ex's lives to intertwine once again.