piro (artist), piro (orip), black hanekawa, hanekawa tsubasa, bakemonogatari, monogatari (series), nekomonogatari, unfinished, 10s, 1girl, animal ears, bare shoulders, barefoot, breasts, cat ears, cat tail, covered erect nipples, feet, female focus, foreshortening, greyscale, large breasts, lineart, long hair, monochrome, one-piece swimsuit, open mouth, soles, solo, swimsuit, tail, toe scrunch, toes