1girl, beach, bikini, blue_archive, blue_bikini, blue_hair, chise_(blue_archive), chise_(swimsuit)_(blue_archive), hair_between_eyes, horns, kneeling, knees_together_feet_apart, long_hair, navel, official_alternate_costume, oni_horns, outdoors, red_eyes, red_horns, rx7649, sand_castle, sand_sculpture, solo, stomach, striped, striped_bikini, swimsuit, trowel, very_long_hair, white_bikini