1girl, ass, barefoot, breasts, crotch, fate/stay_night, fate_(series), flexible, forehead, from_behind, groin, jack-o'_challenge, little_mojoi, long_hair, looking_back, medusa_(fate), medusa_(rider)_(fate), multiple_views, navel, pants, purple_eyes, purple_hair, top-down_bottom-up, underboob, yoga_pants