2girls, ass, blue_eyes, blue_sky, epinel_(nikke), folkwang_(nikke), from_behind, goddess_of_victory:_nikke, green_eyes, grey_hair, hand_under_clothes, holding, holding_water_gun, kana_(wucz8478), long_hair, multicolored_hair, multiple_girls, one-piece_swimsuit, purple_hair, ribbon, sky, swimsuit, water_gun