Rule 34 Dev - black_hair blue_eyes bondage demon demon_boy demon_horns demon_humanoid demon_lord gay horn horns incubus male male_only muscular muscular_male naked nude pecs purple_eyes purple_hair red_eyes red_ribbon shinichi_kai shinichi_kai_(vtuber) succubus tied_up twitch twunk virtual_streamer virtual_youtuber vtuber yaoi|10011962056