matsuo yukihiro, chaos;head, science adventure, game cg, highres, official art, 1boy, 1girl, 2000s (style), ahoge, asymmetrical hair, black coat, black jacket, black pants, black shirt, blonde hair, coat, collared shirt, d-sword, evil eyes, furrowed brow, holding, holding sword, holding weapon, huge weapon, jacket, lapel pin, lapels, long sleeves, looking at viewer, male focus, narrowed eyes, necktie, norose gen'ichi, open mouth, outstretched arm, pants, peaked lapels, red necktie, red vest, shirt, short hair, solo, sprite, sword, teeth, transparent background, v-shaped eyebrows, vest, weapon