Rule 34 Dev - ace_(undertale_yellow) anal_penetration anal_sex bandana_on_neck big_sub_small_dom black_fur choking flowey_the_flower male_only tapering_penis top_hat topwear_only unbuttoned_shirt undertale undertale_(series) undertale_yellow v01dfvkr vine_bondage vine_in_mouth vine_insertion vine_tentacles|11420955016