Rule 34 Dev - 2boys anal anal_sex clothing cum custapple demon doom_(dota_2) dota dota_2 duo fin fish gay hooves horn line_art lucifer_the_doom_bringer lying male male_only marine missionary_position monochrome nude on_back penetration penis sex size_difference slark_the_nightcrawler small_dom_big_sub video_games white_background yaoi|2147999248