nana (732 kaiten), nanase meruchi, akiyama mio, k-on!, 00s, 1girl, bdsm, between breasts, black hair, blue eyes, blush, bondage, bound, breasts, cover, female focus, head tilt, huge breasts, leaning forward, long hair, nipples, no bra, open clothes, open shirt, panties, puffy nipples, rope, school uniform, self bondage, shibari, shirt, solo, striped clothes, striped panties, underwear, very long hair, vest