FURVERT!

2:3 animated animated_gif anthro avian backsack balls big_butt black_body bodily_fluids butt butt_grab cum cum_inside darkner deltarune genital_fluids genitals hand_on_butt hi_res humanoid humanoid_genitalia humanoid_penis male mask muscular muscular_male nipples nude pecs penis perineum presenting presenting_hindquarters short_playtime solo spread_butt spreading swatchling undertale_(series)ursa-m1nor