Create an ultra-realistic 4K 7-pose couple collage using the uploaded reference photos. Preserve both faces 100% identical to the originals, with exact facial features, skin tones, and hairstyles. Boy: royal blue blazer, white shirt, black trousers, white sneakers. Girl: black saree with red-golden embroidered border, gold jewelry, bangles, long black hair. Include selfie, back-view hand-holding, sunglasses, romantic walking, phone calls, pointing together, and crouching poses. Use separate vibrant orange, blue, pink, golden, green, purple, and red cinematic backgrounds, matching the reference collage layout, professional photography, realistic lighting, sharp details, natural expressions, seamless composition.