1boy, 1girl, beach, bikini, bikini_skirt, comic, curled_up, danganronpa_(series), danganronpa_v3:_killing_harmony, frilled_bikini, frills, greyscale, male_swimwear, monochrome, nogawa_harumi, oma_kokichi, sand_castle, sand_sculpture, short_hair, shorts, squatting, striped, striped_shorts, swim_trunks, swimsuit, yumeno_himiko