1girl, d, adjusting_eyewear, afloat, armpits, bikini, blue_archive, collarbone, eyewear_on_head, frilled_bikini, frills, hair_between_eyes, hair_bobbles, hair_ornament, heterochromia, hoshino_(blue_archive), hoshino_(swimsuit)_(blue_archive), knees_up, long_hair, looking_at_viewer, looking_up, low_twintails, lying, navel, ocean, official_alternate_costume, on_back, pink_hair, rokita, sidelocks, sleeveless, smile, solo, stomach, stuffed_whale, sunglasses, swimsuit, twintails, upside-down, white_bikini