Rule 34 Dev - big_pecs bikini cleavage cupless_bikini demon_slayer facial_mark grabbing_own_breast headband headwear hoodie kimetsu_no_yaiba kyu_717 looking_at_viewer male male_only muscular muscular_male nail_polish navel_piercing open_clothes open_jacket pec_grasp pectoral_grab red_eyes silver_hair smile solo uzui_tengen|6197522944