a k-pop woman shampooing hair, wet long hair falling downward with gravity, both hands massaging scalp with rich dense foam, creamy white bubbles covering hair, side composition with woman on the left, empty space on the right for text placement, partial face visible, minimal studio background in soft beige, hyper-realistic hair texture, premium shampoo commercial aesthetic, , 4k resolution, high-end Korean cosmetic brand mood, professional product photography --s 50