Whose youth is not confused?
Some people secretly have a crush on a boy until they graduate without telling them; while some people have the best friendship at their most youthful age, but have never been exposed to love.
Some people maintain relationships where friendship is more important than love; while some people are bold and persistent just to pursue the boy they like...
You only have one youth, and those missed and regretted will eventually become regrets, but what if you can do it again?
What will be the fate of the four girls?