Jung Ahri and Yoon Juni are bestfriends but each of them have two different personality.

They've been friends for as long as they can remember, like brother and sister. They made a promise when they were both nine years old: to protect each other if any danger comes along, no matter who has done it. But as much as she looks at him as family, he looks at her as something more. And sometimes he can't stop himself from acting that way.