Rule 34 Dev - 1boy 1girl arm_pillow blush couple earrings facial_mark hand_on_another's_head happy headdress hetero highres japanese_clothes jewelry kimetsu_no_yaiba kimono long_hair looking_at_another monochrome nagasawa_setsu portrait simple_background smile spot_color tsugikuni_yoriichi uta_(kimetsu_no_yaiba)|18170159553