piromizu, hoshikawa koharu, kanbayashi mizuki, takayashiro sayuki, amakano, official art, 3girls, bikini, black hair, blue eyes, blue sky, breasts, brown eyes, brown hair, cloud, cloudy sky, copyright notice, day, green eyes, heterochromia, large breasts, looking at viewer, mismatched bikini, multiple girls, o-ring, o-ring bikini, open mouth, orange bikini, purple eyes, sky, standing, swimsuit, white bikini