Photorealistic live-action cinematography, bright daylight on pale blue pool tiles, natural skin texture and visible pores, vertical 9:16 frame.

There are exactly two people in this clip and their roles never swap.
<Subject 1> is the MAN, whose eyes the camera is. He sits at the edge of the pool with his legs open toward her. Only his thighs at the bottom edge of the frame, his pelvis and his erect penis rising into the lower centre of the shot are visible; his face and hands are never visible because the camera is his eyes. His erect penis grows from his own pelvis and stays attached to his body for the whole clip, a single continuous organ with one glans.
<Subject 2> is the WOMAN from the source image, kneeling between his open thighs and leaning forward toward the camera: long straight black hair with a blunt fringe, very large breasts in a tiny white string bikini top, white lace-topped thigh-high stockings. She keeps this same face, hair, body and outfit for the entire clip and never turns into anyone else. Her body has no penis of any kind.

The same poolside setting as the source image: pale blue tiled deck, water at the left, bright daylight, unchanged. The camera is fixed and never moves. The sound is a quiet outdoor pool: soft water lapping against the tiles, a faint echo off the walls, and the wet sounds of her mouth and hand.

In the first second she lets her breasts fall away from his shaft and wraps her right hand around it instead, closing her fingers around the middle of the shaft. Her left hand rests on his thigh.

For the remaining nine seconds she repeats one rhythm over and over without stopping: she strokes her right hand up and down the shaft three times at a steady pace, her wrist twisting slightly on each upstroke; then she dips her head, sticks her tongue out flat and licks the tip of his glans with two slow broad strokes; then she lifts her head, looks into the lens and smiles for a beat; then she goes back to stroking. Stroke, lick, smile, stroke, lick, smile — this continues for the whole clip and her right hand never leaves the shaft.

Between the licks <Subject 2> looks straight up into the camera with a bright playful smile, tongue out, eyes crinkling, cheeks flushed, clearly enjoying herself and teasing him. Her expression stays cute and cheerful and never turns pained or blank. His shaft stays in her right hand at all times and only its tip is ever touched by her tongue.

<d>[Korean] 오빠 손으로 해주는 거 좋아?</d>
<d>[Korean] 끝만 살짝 핥아줄게 봐봐</d>
<d>[Korean] 물에서 이러니까 더 야하다</d>

Avoid: her right hand leaving the shaft, the penis going into her mouth, the penis entering her vagina, a penis growing out of the woman's body, her bikini top coming off, the man's hands appearing in frame, the man's face appearing, the two people swapping roles, an angry or pained or blank expression, the camera moving, any change to her hairstyle, bikini, stockings or body shape, any third person entering frame, and any extra or deformed limbs.