1girl, absurdres, animal_ear_fluff, animal_ears, ass, bare_legs, bare_shoulders, bikini, black_bikini, black_hair, blue_archive, blush, breasts, cameltoe, cat_ears, cowboy_shot, crotch, day, extra_ears, frilled_bikini, frills, from_behind, from_below, hair_between_eyes, halo, highres, long_hair, looking_at_viewer, looking_back, ocean, official_alternate_costume, outdoors, pink_halo, red_eyes, sakura_rii, serika_(blue_archive), serika_(swimsuit)_(blue_archive), small_breasts, solo, swimsuit, twintails, water