Rule 34 Dev - 2008 abs ass bamboo black_hair butt demon detailed detailed_background hiei human human_only low_res lowres male male_focus male_only monochrome muscle muscular muscular_arms muscular_ass muscular_butt muscular_legs muscular_male nipples nude nude_male penis ryukotsusei signature sitting solo spiked_hair spiky_hair towel towel_only vein veiny veiny_penis watermark yu_yu_hakusho|65713640