watanabe mayumi, ichimonji mutsuki, sanzein yayoi, sanzen'in yayoi, happy lesson, megami magazine, official art, official wallpaper, 00s, 2girls, :d, ;d, aqua eyes, arms up, beach, bikini, blue bikini, blue sky, braid, brown hair, casual one-piece swimsuit, clenched hand, cloud, day, eye contact, floral print, front-tie top, glasses, grey hair, hair intakes, leaning forward, lens flare, light rays, long hair, looking at another, mountain, multiple girls, navel, ocean, one-piece swimsuit, one eye closed, open mouth, orange eyes, outdoors, outstretched arms, outstretched hand, palm tree, parted bangs, print swimsuit, profile, side-tie bikini bottom, sidelocks, single braid, sky, smile, sparkle, splashing, standing, sun, sunbeam, sunlight, swimsuit, tree, umbrella, very long hair, wading, water, watermark, wince, wink