Sunggyu & Daehyun where both staying in an orphanage. Sena was the Daughter of one of the Woman who volunteered at the orphanage and became friends with Sunggyu & Daehyun. When Sunggyu got Adobted they got separated Since Sunggyu had to move To Seoul. A few years Later Daehyun got Adobted too by a family in busan. The 3 of them made a promise when Sunggyu left. What will happen to their Friendship?