altar anthro bioluminescence black_skin bound breasts chain claws crystal cuffs cum cum_inside cum_on_back demon dewclaw digitigrade dripping ear_piercing eyes_closed facial_piercing fangs female fluffy forced from_behind fur glowing glowing_eyes grin hellhound horn knot male masturbation multi_cock nipples nose_piercing nose_ring open_mouth patto penis piercing purple_fur rape restraints runes sex spade_tail standing straight teeth yellow_eyes yellow_skin