Really Bad Girl

Yue Lihuan, or called as Luna. A girl who loves being the bad girl. Along with her best friend, Koh Xiaohui, or known as Sunnie. ("Yue" means moon. "Xiaohui" means "Morning Sun" or somthing like that) When did they became bad? How did they became bad? Nobody knows. Well they do know about Sunnie's little history. But Luna? It's a mystery to them. A new student transferred to their school, not knowing anything about the two troublemakers. He was a good, positive and a soft af boy with really high marks. But what happens when he encountered the "Small But Terrible Little Devil"?