Rule 34 Dev - 1boy aged_up blush_stickers brown_theme bruise cropped_shoulders forked_eyebrows hair_slicked_back hand_up injury japanese_clothes kimetsu_no_yaiba kimono kkk_0mg kotetsu_(kimetsu_no_yaiba) long_sleeves looking_at_viewer male_focus medium_hair monochrome no_mask portrait simple_background smile solo sparkle twitter_username|18889649064