yanpooru, osaki tenka, idolmaster, idolmaster shiny colors, highres, 1girl, arms behind back, artist name, bdsm, black socks, bondage, bound, bound ankles, bound arms, bound legs, breasts, brown hair, brown sweater, chair, desk, from above, full body, grey skirt, long hair, long sleeves, looking at viewer, miniskirt, on chair, plaid clothes, plaid skirt, rope, school chair, school desk, shoes, sitting, skirt, sneakers, socks, solo, sweater, wavy mouth, white shoes, yellow eyes