Kwon Yuri is a Poor women that Works at her bestfriends bar . Exo are a college graduate working at their Father's Company ,Have a little sister named Joy . One day Exo and Joy have a little argue ,Joy decided to leave their house ,andn then met Yuri ..Yuri is a kind person ,although she's poor she choose to help the girl ..Exo is going crazy if they didnt find their Little Sister  "Joy-ah !"Exo ran towards Joy but their little sister towards Yuri and hugged her ....