satou katsuyuki, tsukinomori mashiro, tomodachi no imouto ga ore ni dake uzai, highres, official art, 1girl, anime coloring, blue sweater vest, blush, braid, breasts, brown shoes, clenched hand, collared shirt, diagonal-striped clothes, diagonal-striped necktie, full body, grey eyes, grey hair, hair over one eye, hand on own chest, hand up, large breasts, loafers, looking at viewer, necktie, open mouth, parted lips, plaid clothes, plaid skirt, pleated skirt, red necktie, school uniform, shirt, shoes, short hair, simple background, skirt, smile, solo, standing, striped clothes, sweater vest, tachi-e, teeth, thighhighs, thighs, transparent background, white thighhighs