1boy, 1girl, akamatsu kaede, beach, bikini, bikini skirt, comic, danganronpa (series), danganronpa v3: killing harmony, frilled bikini, frills, from behind, greyscale, male swimwear, monochrome, nogawa harumi, ocean, ouma kokichi, playing, saihara shuuichi, sand castle, sand sculpture, short hair, shorts, squatting, striped, striped shorts, swimsuit, upper body, yumeno himiko