masterpiece, best quality, highly detailed anime illustration, dark Korean manhwa × vintage manga print style, monochrome deep cobalt blue, navy-black and white, rough ink lines, dry-brush hatching, halftone shading, risograph texture, aged paper grain. Tight upper-body portrait of an adult man leaning toward the viewer from a slightly high angle, direct eye contact, one hand loosely covering his mouth. Heavy-lidded stare, faint dangerous smile, cold obsessive yandere mood. Loose dark open-collar shirt with a long coat or oversized cardigan, slightly exposed collarbone. Dramatic blown-out white highlights and deep ultramarine shadows. Minimal off-white paper background with faint ink stains and abstract dark shadow. Eerie, oppressive, forgotten manga panel feeling. Avoid colorful palette, cheerful mood, busy background, glossy rendering, chibi proportions, bad hands.