Characters: Mei Mei Chang (Older Sister) 21Years Old Hard-working and smart. She always respects older people. She never fails her job. Loraine Chang 14Years Old Lazy and stubborn. She always fail in her exam.But she's smart but too lazy to study. She flirts with guys who likes her just to tease them. Xi Luhan 22 Years Old Came from a wealthy family. Loves his parents so much. Kai a.k.a. Kim Jong In Lazy and flirty. He came from a wealthy family. Lazy to study and always flirts. Park Chanyeol 19 Years Old (In this story) His the happy virus and the saviour of the 2 sisters whenever they fight.