1girl bare_arms bed_sheet blue_pants brown_hair closed_mouth collarbone commission denim flat_chest frown groin highres indoors kono_subarashii_sekai_ni_shukufuku_wo! kuronuketaiyo looking_at_viewer lying megumin navel nipples on_side open_fly pants pillow red_eyes short_hair_with_long_locks sidelocks skeb_commission solo straight_hair topless