ออกแบบตัวละครมังงะเซเน็นแบบเต็มตัวลายเส้นคม

A clean, standalone full-body manga illustration of the boy from the reference image, rendered in a [Kaiji-inspired angular seinen manga] style. Features sharp facial geometry, narrow triangular eyes, a pointed nose, harsh zigzag contour lines, and heavy dramatic ink shadows with monochrome screentone rendering. The character stands in a [front-facing, head slightly lowered, both hands in pockets] pose with a slight contrapposto lean and an aloof, cool expression. He wears a [light open jacket, black shirt, dark pants] combination featuring a high popped collar over a black shirt, dark straight-leg pants with a belt, and oversized chunky shoes, keeping his spiky hair silhouette. Centered figure on a [plain white] background, completely free of annotation text, turnaround guides, inset panels, tone swatches, or sample expressions.