matsuo yukihiro, chaos;head, science adventure, game cg, non-web source, official art, 1boy, arm hair, ban yasuji, beard stubble, belt, belt buckle, black belt, black hair, black necktie, brown jacket, brown pants, buckle, dress shirt, dress shirtl, facial hair, grey eyes, hands in pockets, jacket, looking at viewer, male focus, messy hair, necktie, one eye closed, oose necktie, open collar, pants, shirt, short hair, smile, solo, sprite, stubble, suit jacket, transparent background, white shirt