Once upon a time,

Well, not that long ago, in Japan. There is a girl living together with her stepmother and her two daughters. Now, the stepmother remarried again with a Korean man and the new family has to move to Korea.

Her life is so boring and ordinary before her meeting with them in her new school.

They are rich. They are pretty. They are perfect in everything. They are like angels to her. They bring the awesomeness to her life. 

They are life long childhood friends. They love each other as a family. When they meet a poor Japanese girl, they have so much interest in her. When feelings are involved, can they stand together like always?

What will happen when they are infected with Sakura virus?

One sure thing is that love will blossom in this story.