2girls, armpit crease, asakura nuruma, ball, bangs, beach, beachball, bikini, bikini under clothes, black hair, blue eyes, blue sky, blurry, blurry background, blush, braid, breasts, cleavage, clothes lift, collarbone, covered nipples, day, finger to own chin, hair between eyes, hair ornament, hairclip, holding, holding clothes, holding innertube, holding swimsuit, innertube, long hair, looking at viewer, makinohara shouko, medium breasts, midriff, multiple girls, navel, ocean, outdoors, rabbit hair ornament, red bikini, sakurajima mai, seishun buta yarou, shiny skin, shirt, shirt lift, single braid, sky, smile, stomach, string bikini, swimsuit, thighs, watch, water, wet, wet clothes, wet face, wet shirt, wet swimsuit, white bikini, wristwatch, yellow innertube