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anthro anus avian back_cover bird bottomwear bow_tie butt chair clothing clothing_aside cover crop_top demon demon_humanoid drstrangeluvve duo facial_hair furniture hand_on_butt hellaverse helluva_boss hi_res horn humanoid imp looking_at_viewer male male/male mister_butler_(helluva_boss)monochrome mustache owl owl_demon paimon_(helluva_boss)presenting presenting_anus presenting_hindquarters school_uniform shirt size_difference skirt spread_butt spreading topwear underwear underwear_aside uniform