-Arianna is a girlfriend of JongHyun. Her bestfriends GD,TOP,Taeyang,Daesung,Seungri and Suzy(her sister) is always there for her.

-But however JongHyun doesn't know that her ex-girlfriend(Yoona) is pregnant with his child.

-While Arianna doesn't know that Seungri and GD has feelings for her.