2girls alternate_costume back-to-back blue_hair blush breasts brown_eyes brown_hair closed_mouth hair_ribbon hiryuu_(kantai_collection) kantai_collection large_breasts looking_at_viewer multiple_girls open_mouth remodel_(kantai_collection) ribbon short_hair simple_background smile souryuu_(kantai_collection) sweater wa_(genryusui) white_background white_sweater yellow_sweater