2girls, alternate_hairstyle, ass, bare_shoulders, blush, breasts, cleavage, eyeball, green_eyes, looking_at_viewer, lying, multiple_girls, no_hat, no_headwear, off_shoulder, on_back, on_stomach, one-piece_swimsuit, pink_eyes, pink_hair, school_swimsuit, short_hair, siblings, silver_hair, sisters, small_breasts, smile, strap_slip, swimsuit, third_eye, wet