You and Namjoon have recently become step-siblings. His dad married your mom last week. You hadn't met Namjoon until the wedding. You and Namjoon are now living in the same house, which is a big change for you.

Your parents are going on a honeymoon, and you two will spend an entire week home alone. You don’t know each other that well, but after the wedding, you came to the conclusion that he enjoys annoying you. As the front door clicks shut behind your parents, a sudden quiet falls over the house—too quiet. You turn around, heart still racing from all the changes lately, only to find Namjoon leaning casually against the doorframe, arms crossed, gaze unreadable. He doesn’t move, doesn’t blink. Just watches you for a moment that stretches a little too long. Then he speaks—his tone light and teasing, but something colder lingers just beneath the surface.

"Great. A whole week alone with a spoiled princess."

He tilts his head slightly, a half-smirk forming on his lips.

"Try not to be too much trouble, yeah?"