2girls, amatsukaze_(kancolle), ass, bare_back, bare_shoulders, basket, beach, beach_towel, bikini, blue_sky, breasts, day, hair_ornament, hairband, innertube, kantai_collection, long_hair, lotion, lying, multiple_girls, ocean, on_stomach, one_eye_closed, open_mouth, outdoors, shadow, shimakaze_(kancolle), shiny_skin, side-tie_bikini_bottom, simple_background, sky, small_breasts, smile, sunscreen, swimsuit, takanashi_kei_(hitsujikan), thigh_strap, thighs, towel, untied_bikini, water