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, closed eyes, dress shirt, dress shirtl, facial hair, facing viewer, hands in pockets, jacket, male focus, messy hair, necktie, oose necktie, open collar, open mouth, pants, shirt, short hair, smile, solo, sprite, stubble, suit jacket, transparent background, white shirt