Daehyun and you already know each other for a long time . Since you two was child you two already know each other . That time Daehyun was 7 and you was 5 years old . You guys go to school together , eat together , talk together all the things that you do he , Jung Daehyun always at your side . He saw you like his own dongsaeng but not to you . you saw him more than a brother ; more than friend . But lovers .

One day , Daehyun's dad want Daehyun to married with you . You really happy about it , about the news that Daehyun will married you . But not for Daehyun . You two get married at other country . Daehyun serious change .. he not like the old Daehyun who always take care of you . Always at your side . Always eat with you . Always talk with you . Always go to school with you . He totally change . Plus !!, when you guys officially married ; Han Sunhwa , Daehyun's girlfriend capturing you two . 

This is a triangle love or a unrequited love ?? Will Kwanghee help her sister , You / Airi hwang get out of this world ?