写实摄影健硕男性深色内裤展示肌肉线条时尚人像照片

realistic photo, minimalist style, gray and white color scheme, black hair and muscle lines, adult male, serious expression, looking down at abdomen, hands naturally hanging, body slightly leaning forward, gray boxer briefs with white trim, simple composition, focus on muscle lines and serious expression, calm and focused atmosphere,8K, high-definition, photographic image