you and Jeongin have been best friends since first grade. but at the end of 9th grade you quarreled because you had a best friend and you shared everything with her. he didn't like that you told her everything and didn't talk to him as often as before.

now you and Jongin are already in 11th grade, finishing your senior year. Now everyone is preparing for graduation and your class has decided to perform a waltz for graduation. everyone has already split into pairs, only you and Jeongin.