akikan korogashi, haishigu noriko, harisen houya, hitotsubashi yurie, saegusa matsuri, saegusa miko, shijou mitsue, shime jii, kamichu!, official art, photo (medium), 00s, 4girls, :d, age difference, alternate hairstyle, ball, barefoot, beach, beachball, black hair, blue eyes, blue one-piece swimsuit, blunt bangs, blush, bob cut, breasts, brown hair, calendar, can, casual one-piece swimsuit, closed eyes, cloud, day, feet, flat chest, glasses, grin, hug, hug from behind, innertube, kneepits, large breasts, long hair, lying, mountain, multiple girls, name tag, ocean, on ground, on head, on stomach, one-piece swimsuit, open mouth, outdoors, person on head, pink one-piece swimsuit, polka dot, ponytail, red eyes, school swimsuit, seiza, shade, siblings, sidelocks, sisters, sitting, sky, smile, striped clothes, striped one-piece swimsuit, swim ring, swimsuit, whale, yellow one-piece swimsuit