sasaki mutsumi, tachibana yui, chaos;child, science adventure, game cg, official art, 1girl, black hair, black pantyhose, bob cut, brown eyes, brown hair, brown skirt, collared shirt, long sleeves, looking at viewer, miniskirt, pantyhose, pink sweater, pleated skirt, shirt, shirt under sweater, short hair, simple background, skirt, smile, solo, standing, sweater, swept bangs, thighs, white background