A highly detailed, realistic animated video sequence generated in high resolution 4K, 60fps, lasting exactly 5 seconds, Begin with an attractive young woman in her mid-20s, long auburn hair cascading down her back, pale skin, slender hourglass figure with perky B-cup breasts, flat stomach, toned legs, wearing skimpy black lace lingerie, bound tightly in intricate rope bondage—wrists tied behind her back, ankles secured together, a harness around her torso emphasizing her curves, kneeling on a soft padded floor in a dimly lit dungeon room with stone walls, flickering candlelight, and subtle chains hanging in the background. She struggles playfully against the restraints, squirming and moaning softly, her body glistening with a light sheen of sweat, nipples hardening through the fabric. Over the brief sequence, she undergoes extremely rapid weight gain transformation—starting slim at around 120 pounds, accelerating intensely to add 200-300 pounds in total by the end, morphing smoothly from athletic to curvy, chubby, plump, and massively obese. Breasts swell explosively to massive G-cups sagging heavily with stretch marks, belly inflating into a soft round potbelly then enormous apron-like overhang folding over her thighs, hips widening dramatically, ass expanding into huge jiggly cheeks straining and snapping the ropes slightly, thighs thickening with cellulite and dimples, double chin forming, cheeks rounding out—fat rippling and jiggling realistically with every restrained movement, skin textures shifting from smooth to soft and textured, lingerie tearing at seams from the expansion. Throughout, she reacts with surprise turning to arousal, eyes widening, biting her lip, hips bucking futilely against the bonds, pussy becoming visibly wet and dripping, leading to breathy gasps and a climactic shudder as the weight gain peaks. Camera angles dynamic—close-ups on swelling body parts like breasts, belly, and ass, wide shots capturing the full transformation, slow-motion effects to emphasize jiggle and expansion details within the short duration. NSFW, explicit BDSM erotica with rapid weight gain fetish elements, masterpiece style inspired by adult animations like those from Affect3D or Renderotica, ultra-realistic textures, volumetric lighting, no censorship.