matsuo yukihiro, chaos;head, science adventure, game cg, official art, 1boy, 1girl, 2000s (style), ahoge, asymmetrical hair, black coat, black jacket, black pants, black shirt, blonde hair, coat, collared shirt, hair over one eye, half-closed eye, jacket, lapel pin, lapels, long sleeves, looking to the side, male focus, necktie, norose gen'ichi, open mouth, pants, peaked lapels, red necktie, red vest, shirt, short hair, solo, sprite, transparent background, uninterested, vest