Being Niall Horan's Abandoned Sister

Claire Horran is a result of a affair of their mom with a Korean ulzzang, her Korean name is Sooyoung Kim. She is not accepted to the family as if she is a ghost, she left at the age of 10. Stays in an orphanage name "Guardian's orphanage" One family arrived the Kim family from Korea, they adopted her because she is the long lost daughter of Mr. Kim.

What will happened to niall's sister?
Will they Meet again?
What if Claire's new brother is Suho from exo?

This is a crossover of Kpop and Apop.

Some mentions of other kpop boy group like bts, seventeen, teentop, and got7.