In Kim Yun-hee's world, there are only two important things
One is dancing, the other is Jung Hoseok
13-year-old Kim Yoon-hee is jealous of Jung Hoseok, who is the best dancer in the dance troupe.
17-Year-old Kim Yoon-hee is still jealous of Jung Hoseok because he became a member of BTS and appeared on the stage she dreamed of.