Write a detailed script and scene description for a 15-second short-form video (TikTok/Reel style). The scene is captured as a mirror selfie video, focusing on realistic physics, organic character movement, and natural dialogue pacing.

**Setting:** A bright, modern white and grey bedroom. The camera is a silver smartphone with a triple-lens camera, held by Ash to film her reflection in a full-length mirror.

**Character 1: Ash**
– **Appearance:** Young woman, pale skin, defined eyebrows, subtle makeup with pink lipstick. Long, straight dark brown hair with bangs.
– **Outfit:** An oversized maroon hoodie with white lettering and a small sleeve logo, styled off one shoulder to reveal her collarbone; paired with tight, form-fitting dark gray high-waisted leggings that accentuate her curves.

**Character 2: Gianna**
– **Appearance:** Confident young Black woman with long black box braids, oversized black-framed glasses, large gold hoop earrings, and a thin gold necklace.
– **Outfit:** An oversized, distressed light-blue denim jacket (rolled sleeves, visible rips) over a tight white spaghetti-strap crop top that exposes a toned midriff and navel piercing. Paired with baggy, high-waisted light-blue jeans with a white thong waistband peeking above the waistline.

**The Sequence (15 Seconds):**
1. **0-4s:** The video opens mid-action. Ash is posing for the mirror selfie, looking back over her shoulder with a slight, practiced smile. Her expression suddenly shifts to dissatisfaction. Without turning around, she yells over her shoulder: *”Hey, Gianna!”*
2. **4-6s:** An offscreen female voice (British accent) replies with a casual: *”What?”*
3. **6-8s:** Ash, sounding slightly annoyed/insecure: *”Come here please, I need your opinion.”*
4. **8-11s:** Gianna walks into the frame from the left. She stops, looks Ash up and down, and asks with a smirk: *”What?”*
5. **11-13s:** Ash gestures to her lower body and asks: *”Do these leggings make my butt look too big?”*
6. **13-15s:** Gianna pauses, eyes Ash’s rear for a beat, and replies with a grin and a nod: *”Hell yeah.”* Gianna delivers a playful, firm smack to Ash’s backside. The impact causes a realistic, soft jiggle of the fabric and flesh. Ash’s expression softens into a small, satisfied smile as the video cuts.

**Technical Requirements:**
– **Dialogue:** Must flow naturally, avoiding stilted phrasing.
– **Pacing:** Ensure the timing of the movements and the dialogue fits tightly within a 15-second window.
– **Visuals:** Emphasize the contrast between Ash’s tight silhouette and Gianna’s oversized streetwear.