Photorealistic live-action cinematography, soft even indoor light, 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 is off-screen except for his thighs and pelvis at the bottom edge of the frame, his erect penis rising from his own pelvis into the lower centre of the shot, and his two arms and hands reaching up into frame from the bottom. Only <Subject 1> touches the woman's breasts. His erect penis grows from his own body and stays attached to it the whole time.
<Subject 2> is the WOMAN from the source image: long straight black hair with blunt fringe, large bare breasts fully exposed, a small dark tattoo above her right breast, black lace garter belt and black lace-topped thigh-high stockings. She keeps this same face, hair, body and outfit for the entire clip. Her body has no penis of any kind. <Subject 2> never touches her own breasts at any moment; her hands are busy on his shaft.

A POV shot looking down at <Subject 2> from the man's eyes. The same white bedding, white pillow, dark wooden headboard and soft even indoor light, unchanged. The camera is fixed and never moves.

The motion has two beats. FIRST TWO SECONDS: <Subject 2> pushes herself up off her back and sits upright facing the camera, kneeling on the bed between his legs, and wraps her right hand around <Subject 1>'s erect shaft. At the same moment <Subject 1> brings both hands up onto her bare breasts.

REMAINING EIGHT SECONDS: both actions run at the same time and never stop. <Subject 2> leans her head forward over his shaft, purses her lips and lets a thick string of saliva drip down out of her mouth onto the head of his penis, then closes her wet hand around it and strokes it up and down at a steady rhythm, the shaft glistening and slippery, her wrist twisting slightly on each upstroke. She repeats the spitting twice more during the clip, each time leaning in, dripping saliva onto the shaft, then going straight back to stroking. Meanwhile <Subject 1> kneads both of her breasts continuously with his two hands, fingers sinking into the soft flesh and releasing, the breasts squashing and springing back with each squeeze, never letting go.

Throughout the clip <Subject 2> keeps looking straight up into the camera between the strokes 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 a single continuous organ with one glans, wet and shining, held in her hand at all times.

<d>[Korean] 오빠 침 발라주면 더 좋지?</d>
<d>[Korean] 가슴 그렇게 주무르면 반칙이야</d>
<d>[Korean] 손 안 멈출 테니까 그냥 싸</d>

Avoid: the woman touching her own breasts, the man's hands leaving her breasts, the woman's hand leaving his shaft, the woman lying back down, the penis entering her mouth, the penis entering her vagina, a penis growing out of the woman's body, the two people swapping roles, an angry or pained or blank expression, the camera moving, any change to her hairstyle, tattoo, stockings or body shape, any third person entering frame, and any extra or deformed limbs.