Rule 34 Dev - 1boy 1girl ahoge animated anime_screenshot araragi_koyomi araragi_tsukihi ass black_hair bouncing_breasts breasts brother_and_sister completely_nude covering_privates egg_hair_ornament female_focus food-themed_hair_ornament groin hair_ornament highres long_hair medium_breasts monogatari_(series) navel nude panties siblings soap soap_bubbles sound stomach tagme thighs tsukimonogatari underwear very_long_hair video washing white_panties wide_hips|21907338219