hiiragi kagami, hiiragi tsukasa, izumi konata, kogami akira, kuroi nanako, narumi yui, shiraishi minoru, takara miyuki, lucky star, tagme, 00s, 6+girls, antenna hair, back, ball, beach, bikini, blonde hair, blue eyes, blue hair, blue one-piece swimsuit, blue school swimsuit, braid, cousins, glasses, green eyes, green hair, long hair, mole, mole under eye, multiple girls, one-piece swimsuit, open mouth, pink hair, purple hair, sand, school swimsuit, short hair, siblings, sisters, sitting, standing, swimsuit, tongue, twins, very long hair, water