Rule 34 Dev - bar_censor black_hair body_markings demon_boy demon_slayer emaciated erection facial_markings gradient_hair gyutaro hip_bones kimetsu_no_yaiba large_penis looking_at_viewer looking_back male male_only multicolored_hair mummi_milkers penis penis_out precum precum_drip ribs sharp_teeth skinny solo solo_male tiny_waist two_tone_hair underwear vertebrae|6689288264