Rule 34 Dev - 2021 3d_(artwork) anal anal_sex anthro arm_hair artist_name asgore_dreemurr avian balls beard black_body black_feathers blonde_hair bodily_fluids body_hair boss_monster bovid caprine chest_hair darkflash23 darkner deltarune detailed_background digital_media_(artwork) duo eyewear facial_hair feathers fingers fur genital_fluids genitals glasses goat hair hi_res horn inside leg_hair long_ears lying male male/male mammal mature_anthro mature_male nipples nude on_back penetration penis precum short_hair source_filmmaker swatch_(deltarune) swatchling teeth undertale undertale_(series) video_games white_body white_fur|6492924632