色核心：
Hanabi Yasuraoka (安乐冈花火), from the manga "Scum's Wish" (A渣的本愿), Japanese high school girl.

外貌细节：
short black hair, straight hair with blunt bangs covering forehead, delicate and refined facial features, soft and slightly melancholic expression, fair smooth skin, very subtle blush on cheeks.

服装细节：
Japanese school uniform (sailor fuku or similar style), white collared shirt, dark-colored cardigan worn over shirt, pleated plaid skirt (likely in dark tones), knee-high socks, black leather shoulder bag.

姿态与动作：
standing in a slight side view (sideways), body slightly hunched with a pensive posture, holding a smartphone with one hand and looking down at its screen, the other arm crossed over chest or holding the elbow of the phone arm.

背景与氛围：
indoor hallway or classroom setting with tiled walls, minimalistic background, manga-style speech bubble or text panels, plain yellow background with some Japanese text or sound effects to enhance the manga panel feel.

画风与质量：
pure black and white manga art style, clean and precise line art, high contrast between black and white, detailed shading and hatching, typical anime/manga rendering, ultra-high detail, 8k resolution.