aruka (alka p1), hina (blue archive), hoshino (blue archive), hoshino (swimsuit) (blue archive), blue archive, absurdres, highres, 2girls, ahoge, bare shoulders, bikini, black bikini, blue-tinted eyewear, blue eyes, blue jacket, blue sky, breasts, day, eyewear on head, floating hair, frilled bikini, frills, groin, hair bobbles, hair ornament, halo, heterochromia, inflatable toy, inflatable whale, innertube, jacket, long hair, looking at viewer, low twintails, multiple girls, navel, official alternate costume, open mouth, outdoors, pink hair, side-tie bikini bottom, sky, small breasts, smile, standing, stomach, summer, sunglasses, swim ring, swimsuit, tinted eyewear, twintails, white-framed eyewear, white bikini