1girl bare_back barefoot black_eyes black_hair bubukka butt_crack commentary_request from_behind hair_bun hair_ornament hair_stick kunoichi_tsubaki_no_mune_no_uchi looking_at_viewer looking_back mokuren_(kunoichi_tsubaki_no_mune_no_uchi) ninja open_mouth short_hair simple_background single_hair_bun sitting solo topless wariza white_background