you have a twin sister, you love her very much but you didn't know that your sister and your

friend that you liked since grade 1 are dating you got really hurt but you

hide that you liked him because you don't want to hurt your unnie..

but one day on youur birthday your unnie got into a car accident and died

but your friend couldn't forget about her,,,,,

you tried telling him hat you like him but he just won't listen....

and youngmin here is the one that helping you to tell kwangmin what you really feel..