Rule 34 Dev - 6_eyes arms_behind_back bara big_pecs big_penis bondage dark_hair demon_boy demon_slayer disembodied_penis erection facial_mark fangs gay kimetsu_no_yaiba kokushibo male male_only michikatsu_tsugikuni multi_eye muscular pecjob penis red_sclera rope_harness shibari uncensored upper_body yaoi yellow_eyes|5591442912