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, his pubic hair and his erect penis rising from his own pelvis 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: long straight black hair with a blunt fringe, very large breasts spilling out of a tiny white string bikini top, a white lace garter belt at her hips and 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, clear blue 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, faint echo off the walls, and the wet sounds of her mouth.

The motion has two beats. FIRST THREE SECONDS: <Subject 2> pushes up from where she sits on the wet tiles, turns toward the camera and moves forward on her hands and knees across the deck until she is between his open thighs, her huge breasts swinging heavily beneath her, her eyes locked on the lens, stopping with her chest just above his erect penis.

REMAINING SEVEN SECONDS: <Subject 2> presses her two breasts together around his shaft with a hand on the outside of each breast and slides her chest slowly up and down along it, the soft flesh dragging over the shaft, again and again without stopping. At the top of every slide the glans emerges from her cleavage and she dips her head, sticks out her tongue and licks the tip of it — flat slow licks across the underside of the glans, two or three each time — then goes straight back to sliding her breasts. She repeats this rhythm, breasts sliding then a lick on the tip, for the rest of the clip.

Between licks <Subject 2> looks straight up into the camera with a bright playful smile, 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 between her breasts or at her tongue at all times.

<d>[Korean] 오빠 물에서 나오니까 더 커졌네</d>
<d>[Korean] 가슴으로 해줄게 여기 봐봐</d>
<d>[Korean] 끝만 핥아줄까 아니면 다 빨까</d>

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