Flash Photo School Hallway Uniform

Create a gritty flash-photography candid photo in a dim high school hallway, vertical 2:3 aspect ratio, with a teenage student in a dark Korean/Japanese-inspired school uniform posing full-body beside a long wall of pale blue-gray metal lockers covered with stickers, labels, tape marks, doodles, and scratches. The main subject is centered slightly right, leaning one hand against the lockers with one leg crossed in front, wearing school_uniform_style, black thigh-high socks, chunky black-and-white platform sneakers, and carrying a glossy black shoulder bag with silver chain straps. She has hair_color_and_style; her face is intentionally anonymized by a square gray blur. The corridor recedes deeply into the background with fluorescent ceiling lights, reflective gray floor tiles, scattered papers on the floor, and groups of other students in uniforms standing and talking on the left side, their faces also soft or blurred. On the right edge include a red fire extinguisher and a Korean emergency sign with a downward arrow. Use a raw 2000s digital-camera look: harsh direct flash, cool desaturated colors, strong shadows, slight grain, imperfect composition, realistic school clutter, no glamour retouching, documentary snapshot mood. Add a small subtle watermark-like text reading watermark_text in the bottom-left corner.