Rule 34 Dev - 2boys anal c-merc canon_crossdressing crossdressing cum demon_boy demon_slayer erection fangs finger_in_mouth from_behind gay implied_anal kimetsu_no_yaiba kimono long_hair looking_back male male_only monochrome muzan_kibutsuji obi penis pink_background uncensored yaoi yoriichi_tsugikuni|7048228520