matsuo yukihiro, aoi sena, chaos;head, science adventure, game cg, non-web source, official art, 1girl, bare legs, blazer, brown jacket, dress shirt, from side, hand up, jacket, kneehighs, lapels, long hair, looking at viewer, loose necktie, miniskirt, necktie, notched lapels, open clothes, open collar, open jacket, open mouth, plaid clothes, plaid necktie, plaid skirt, pleated skirt, profile, purple eyes, purple hair, purple necktie, purple skirt, purple socks, red trim, school emblem, school uniform, serious, shirt, skirt, socks, solo, sprite, suimei academy school uniform, thumb to mouth, transparent background, very long hair, winter uniform