In a accident,Hwayoung and Dongwoon were sent to hospital. But Dongwoon in serious condition that have to send to abroad. Hwayoung lost memory and can't remember everything. Her legs can't work in long time. She always s on her wheelchair,even to school. Her parents hide hwayoung about Dongwoon's story coz they thought she will be sad n hurt again.they also promised with Dongwoon's speech b4 he went abroad with serious condition that don't let Hwayoung know he got accident or in case he died. At school,hwayoung was looked down by every girls in school. She didn't like Jungshin because of his long hair . Then everytime,Jungshin always be near Hwayoung to comfort her n protect her from people who look down her. When he saw hwayoung was looking to girls who were dancing in dancing room,he gave her a hope that one day ur legs will be ok and can Dance.etc they always go for walk every evening.she just know she is happy n comfortable with him. Etc...... The end,hwayoung's memory is back while Dongwoon came back to Seoul and meet her while Jungshin disappear....