1girl arms_behind_back artist_name bikini blue_eyes blush breasts charlotte_e._yeager collarbone commentary_request flower hair_between_eyes hair_flower hair_ornament kuga_zankurou large_breasts long_hair looking_at_viewer navel one_eye_closed red_hair side-tie_bikini_bottom simple_background smile solo strap_gap strike_witches swimsuit upper_body white_background white_bikini world_witches_series