sukua, tk28, hatsune miku, kagamine len, kagamine rin, kaito (vocaloid), meiko (vocaloid), vocaloid, bad id, bad pixiv id, 2boys, 3girls, ball, barefoot, beach, beachball, bikini, black male swimwear, black swim trunks, blue male swimwear, blue swim briefs, cooler, day, dutch angle, kneepits, male swimwear, multiple boys, multiple girls, outdoors, pale skin, red bikini, side-tie bikini bottom, sitting, sunglasses, swim briefs, swimsuit, twintails, umbrella, wading, water