Heeseung as your step brother

Heeseung became your step brother because your father dated his mother, Though you've been dreaming to have a brother ever since you were young and your dad knows it so your dad asked you if you want to have a step brother so you accept it, But when you saw your step brother in personal You didn't think of him as a step brother because he's like a heaven sent because of his appearance, he's so good looking, Best in Grooming, good appeal

You as luna