Rule 34 Dev - 2boys 6_eyes age_difference black_hair black_nails clothed_male_nude_male demon demon_boy demon_slayer facial_markings gay gradient_hair hair_down kaigaku kimetsu_no_yaiba kimono kokushibo long_hair_male male male_only michikatsu_tsugikuni multi_eye nipple_tweak pointy_ears red_sclera tabi yaoi yellow_eyes|6502202048