Handheld iPhone Street Dance Flash Mob in Japanese City

the prompt

A high-energy 15-second continuous iPhone-shot street dance music video on a busy modern Japanese city street.
A stylish female singer-dancer walks continuously toward the camera while performing energetic contemporary choreography combining modern hip-hop, waacking, K-pop dance, commercial street dance, body isolations, shoulder grooves, chest hits, hip accents, arm waves, quick footwork, and expressive performance.
She is both a singer and dancer. She genuinely enjoys the music, occasionally mouths the lyrics, smiles naturally, makes confident eye contact with the camera, and performs with strong musicality and charisma.
IMPORTANT:
The dancer must continuously DANCE while WALKING.
Do not reduce the choreography to ordinary walking with occasional arm movements.
Her feet continuously travel forward while her entire body actively responds to the music.
The choreography should have HIGH MOVEMENT DENSITY throughout the entire 15 seconds.
The flash mob must begin VERY EARLY and gradually grow throughout the shot.
CAMERA:
Shot entirely on a modern iPhone.
Natural handheld smartphone cinematography.
Realistic iPhone image quality.
Sharp but natural smartphone detail.
Slight natural handheld movement.
Subtle smartphone stabilization.
Natural exposure changes.
Realistic autofocus behavior.
Natural wide-angle perspective.
No cinematic crane.
No professional cinema camera.
No gimbal-perfect movement.
No dramatic lens effects.
The camera operator continuously BACKTRACKS in front of the dancer while filming her.
The camera moves backward along the city street while keeping the main dancer centered.
The camera operator walks backward naturally but carefully.
The main dancer remains full-body or near-full-body in frame.
No cuts.
No transitions.
No orbiting.
No camera rotation around the dancer.
No zoom.
No drone.
No slow motion.
==================================================
0.0-1.5s | SOLO
The scene begins immediately on a busy modern Japanese city street.
The main dancer is already walking toward the camera and dancing.
0.0-0.5s:
Right foot forward.
Strong hip-hop bounce through the knees.
Sharp shoulder hit.
0.5-1.0s:
Left foot forward.
Chest isolation followed by a shoulder roll.
Her arms naturally swing into a short waacking movement.
1.0-1.5s:
Right foot forward.
Fast arm circle around the head.
Hip accent.
Small head nod toward the beat.
She is clearly dancing, not simply walking.
Several ordinary pedestrians are visible in the background.
==================================================
1.5-3.0s | FIRST DANCER JOINS
The main dancer continues moving forward.
1.5-2.0s:
Left foot forward.
Chest pop → shoulder hit → arm sweep.
A pedestrian walking behind her notices the rhythm and begins subtly copying the shoulder movement.
2.0-2.5s:
Right foot forward.