1girl, ahoge, animal_ears, aoko_(amamiya_aoko), arknights, bare_shoulders, beach, bikini, black_bikini, blue_eyes, blue_sky, blush, breasts, cleavage, cloud, cloudy_sky, fox_ears, hair_ornament, hairclip, looking_at_viewer, low_twintails, official_alternate_costume, oripathy_lesion_(arknights), outdoors, sand, short_hair, short_twintails, sky, small_breasts, solo, spaghetti_strap, sussurro_(arknights), sussurro_(summer_flower)_(arknights), swimsuit, twintails, upper_body, water