hiiragi kagami, hiiragi tsukasa, izumi konata, kogami akira, shiraishi minoru, takara miyuki, lucky star, jpeg artifacts, 00s, 1boy, 5girls, battle, beach, beach party, blue eyes, blue hair, closed eyes, flat chest, friends, glasses, goggles, green eyes, looking at viewer, mole, mole under eye, multiple girls, name tag, one-piece swimsuit, outdoors, party, pink hair, purple hair, school swimsuit, siblings, sisters, standing, swimsuit, twins, water, water gun