Yoona want break up with Yuri with no reason...She start to figure her true feeling to Yuri when she felt very lonely.She want to make up back but Yuri moved from the country.

 

Yoona can't moved on and wait Yuri until she comeback.After 5 year,Yuri comeback to Korea because miss her old friends.Yoona tried everything to make Yuri fall for her again.