3girls, ahoge, alternate_hairstyle, blush, casual_one-piece_swimsuit, flower, hair_flower, hair_ornament, hozuki_kaede, long_hair, low_twintails, multicolored_hair, multiple_girls, one-piece_swimsuit, onii-chan_wa_oshimai!, oyama_mahiro, oyama_mihari, swimsuit, twintails, yellow_one-piece_swimsuit, yoku_soy