1boy 6tygu akaza_(kimetsu_no_yaiba) collarbone colored_eyelashes eyelashes facial_mark facial_tattoo full-body_tattoo hands_on_own_chest hands_up highres hole_in_chest hole_on_body kimetsu_no_yaiba looking_at_viewer male_focus nude pants pink_hair red_background red_hair red_nails short_hair simple_background solo straight-on tattoo text_in_eyes upper_body yellow_eyes