2girls, ass, back-to-back, bent_over, blonde_hair, blue_eyes, blue_one-piece_swimsuit, blush, braid, grey_hair, hat, lifted_by_another, locked_arms, long_hair, looking_at_viewer, lying, michairu, multiple_girls, on_back, one-piece_swimsuit, open_mouth, original, outdoors, red_one-piece_swimsuit, sailor_collar, smile, swimsuit, swimsuit_under_clothes, thighhighs, white_thighhighs, wrist_cuffs