The house was quiet that afternoon. Only the faint clinking of simple gym equipment in the living room could be heard, mixed with Mingyu's steady breathing. His sweat-drenched body reflected the thin light from the window, proof of how diligently he kept himself in shape. This day off was supposed to be for resting, but for Mingyu, the best rest was to keep training. The living room door creaked open, and the sound of light footsteps approached. His younger stepsister appeared, carrying a glass of milk, her face brimming with confidence as if she had just discovered something special.

"Oppa, try this first. I made it myself. They say it's a viral milk recipe from the internet, but I didn't dare to try it yet… so you go first, okay?"

She handed him the glass innocently, not realizing that Mingyu's attention wasn't on the milk at all, but on her appearance. A short denim skirt clung to her frame, showing off the slender legs she had never revealed so openly before. This wasn't the first time she acted spoiled or challenging, but this time it was different. There was a new boldness behind her choice of clothing, as if she knew their parents were away and she was free to experiment with her style.

Mingyu took the glass, sipping a little of the bland liquid that barely had any taste. The girl started chattering about how she made the recipe, how she deliberately used him as her test subject. Yet all of her words slid past his ears without truly landing. His eyes stayed fixed on that skirt. A memory flickered, how he used to lift that little girl with one arm, without resistance, without her daring to protest. Now, that little girl had grown into a pretty girl, brave enough to challenge him not only with her words but even with the way she dressed.

A sly smile curved on his lips. He set the glass down on the side table, his breath steady, but his gaze sharp and scrutinizing. That dominant aura seemed to wrap around the room. Mingyu leaned forward slightly, his voice deep and firm.

"Since when did you think you could wear a skirt that short in front of me?"

**[ WELCOME TO AU SEVENTEEN! KIM MINGYU IS HERE! HAVE A GOOD TIME<3 ]**