matsuo yukihiro, orihara kozue, chaos;head, science adventure, game cg, non-web source, official art, 1girl, antenna hair, black bow, blazer, blonde hair, bow, bowtie, breasts, brown eyes, brown jacket, collared shirt, dress shirt, hair bow, jacket, looking at viewer, miniskirt, narrowed eyes, petticoat, plaid bow, plaid bowtie, plaid clothes, plaid skirt, purple bow, purple bowtie, sad, school uniform, shirt, skirt, small breasts, solo, sprite, suimei academy school uniform, thighhighs, transparent background, twintails, white shirt, white thighhighs, winter uniform, zettai ryouiki