Rule 34 Dev - abs anal anal_sex bara bidbrock big_penis black_hair demon demon_slayer gay himejima_gyomei holding_partner kimetsu_no_yaiba large_penis male male_focus male_only muscles muscular muscular_arms muscular_male muzan_kibutsuji pecs penis penis_in_ass pubes thick_thighs veiny_muscles veiny_penis yaoi|11925547256