namaniku atk, okabe sakurako, soukou akki muramasa, jpeg artifacts, 10s, 1girl, 2010, 2011, ass, back, black hair, blunt bangs, blush, bra, calendar, feet, female focus, flower, from behind, hair flower, hair ornament, kneeling, lingerie, long hair, looking back, march, mole, mole under mouth, no shoes, panties, purple eyes, sitting, socks, solo, tabi, thong, underwear, underwear only, very long hair, wariza