Korean 2D cel-shaded animation style. <Picture 1> is the female character's face and hair design reference - keep her exact face and hairstyle, but replace her outfit with the nude condition described below.

Scene: on a bed. Both characters are adults in their 20s, a couple. Both are nude and stay in the same state for the entire shot. Fixed camera, no movement.

Timeline of actions (total 5 seconds):
1. (0-1s) The man, behind the woman, begins gently stroking her back with his palm.
2. (1-3.5s) His fingers slowly trace down her back to her waist.
3. (3.5-4.5s) The woman flinches slightly at his touch.
4. (4.5-5s) The two look into each other's eyes.

No dialogue, no audio.

No camera movement, no camera shake, no zoom, no pan, no tilt. No more than one action at a time. No speaking, no talking, no lip movement, no voices, no audio. No text overlays, no subtitles, no watermark. No extra people in the background. No outfit change, no clothing change, no wardrobe change - both remain nude from the very first frame for the entire shot.