KIU accidentally hears some familiar melody on the street and recollects those days when she was a student. KIU reveals to LING about her first love during the high school graduation party accordingly. KIU gets a call from SANDY informing her that the yoga school has suddenly closed down and the set tickets they once bought have come to naught. Taking the set tickets from the yoga school, KIU and SANDY shift to join some courses at an art centre. In order to offset the money they have paid as soon as possible, they join the most expensive social dancing course. KIU sees SAI when she is taking the dancing course. Actually SAI is there to help MARK and acts as a teaching assistant of the social dancing class. KIU is teased by SAI when her hands and feet move around uncoordinatedly… When KIU decides not to join the social dancing course anymore, she hears the familiar melody again……