A photoreal photograph with a 3:4 aspect ratio and vertical portrait

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A photoreal photograph with a 3:4 aspect ratio and vertical portrait orientation, showing a shirtless man sitting on a chair in a classroom. He is leaning forward slightly while holding a phone with both hands. The man has thick muscular thighs and legs, wearing gray athletic shorts, white crew socks, and yellow sneakers with white stripes. The background includes desks, chairs, and other students, creating a typical classroom setting. The lighting is neutral, the colors are muted, and the mood is casual and relaxed., shot on iPhone 15 Pro main camera, authentic smartphone computational photography, natural Smart HDR and true-to-life skin texture, vertical 9:16 Xiaohongshu lifestyle feed, bright clean everyday scene, unretouched phone photo with subtle sensor grain, trendy Chinese internet 网红 aesthetic, candid influencer energy, phone held naturally in one hand for selfie, phone visible in frame