K-Pop Idol Portrait Grid for Rapid Selection

A detailed JSON-structured prompt for Nano Banana Pro designed to rapidly generate nine variations of a K-Pop idol portrait based on an input photo. The prompt specifies the subject's demographics, fashion, pose, a nighttime park environment, and technical camera settings (3:4 aspect ratio, warm street lighting, shallow depth of field) to create a 'boyfriend material' aesthetic. The output is arranged in a 3x3 grid with numbered options for quick selection and high-resolution output of the chosen image.

Prompt

Apply to the face of this person only using the following prompt. Arrange in a 3x3 grid layout with 9 different angles, changing expressions like an actual model photoshoot. Display serial numbers starting from 1 in the top left of each image.
{
  "subject_details": {
    "demographics": "Young Asian male, approx 20-25 years old, handsome K-pop idol aesthetic",
    "hair": "Black hair, medium length, curtain bangs / comma hairstyle, soft and natural texture",
    "face": "Looking directly at the camera (eye contact), calm and gentle expression, clear skin",
    "accessories": "Small silver earring in left ear"
  },
  "fashion": {
    "top": "Oversized black knitted crewneck sweater, visible ribbed texture",
    "bottom": "Grey pleated dress trousers / slacks",
    "waist": "Black leather belt with simple buckle"
  },
  "pose_and_action": {
    "posture": "Sitting relaxed on a wooden park bench, body facing slightly forward",
    "hand_action": "Right hand holding black thick-rimmed glasses (removed from face), held at chest level",
    "gaze": "Direct intense eye contact with the viewer",
    "other_hand": "Left hand resting on thigh"
  },
  "environment": {
    "location": "Public park at night",
    "season": "Late autumn / Fall",
    "ground": "Covered with brown fallen dry leaves",
    "background": "Dark trees, distant blurred city lights (bokeh), abstract sculpture silhouette",
    "nearby_objects": "Black backpack resting on the bench next to the subject"
  },
  "technical_specs": {
    "lighting": "Warm artificial street lighting from the side, creating soft shadows on face",
    "aspect_ratio": "3:4 (vertical portrait)",
    "camera_style": "Portrait photography, medium long shot, framing the subject from about 2-3 meters away, sharp focus on subject, shallow depth of field",
    "mood": "Romantic, intimate, boyfriend material (Namchin-jal), night date vibe",
    "color_palette": "Black, warm orange/brown, dark grey"
  }
}