After Yoona's dead, Donghae forget about yoona instead. He's going to engaged with Taeyeon. He's still didn't know that Yoona is the one. When Hae in his friend wedding, He saw Yoona !! But, She's not Yoona, its Kim Hyung. Donghae always joking with Kim hyung that her name like a boy. Hae find Yoona's father, Leeteuk. Leeteuk thought Kim Hyung is his daughhter, So, donghae use Kim hyung to be leeteuk's daugher for a month. Will they end up fall in love?