A Seedance prompt for Biker Birthday Cake that credits nobody

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Make a 7-second vertical night video from the reference picture, first-person view of hands holding a birthday cake.
Picture 1 is the CHARACTER (adult or pet): keep the face, skin tone, hair or fur and build exactly.
Scene: wet empty waterfront lot at night, city lights on the far shore. Plain dark chocolate cake, seven lit candles, no writing on it. Plain black motorcycle and helmet, no logos.
Beats:
0-2s: candles flicker, a headlight comes closer.
2-2.7s: the bike stops behind the cake.
2.7-3.7s: the rider pulls off the helmet.
3.7-4.7s: the CHARACTER's face shows, they smile and lean in.
4.7-5.3s: blows out the candles.
5.3-7s: black and white, slow near-freeze on the smile.
Camera: steady, first person, single take.
Sound: engine ambience, soft warm music. No singing, no lyrics, no speech.
Photoreal. No text, no captions, no logos, no watermark.

Tips for using it

• Attach your photo as the reference picture, with an adult or a pet as the subject.
• Don't put brand names or song names in the beats. Filters often catch them.
• Plans and limits differ between tools. Write the length and shape your plan allows in the first line.
• Add the sound afterwards in Instagram or TikTok and slide it until the candles go out.