4girls, aoi_yun, arm_up, bare_arms, bare_shoulders, black_hair, breasts, cave, cleavage, collarbone, green_eyes, grin, hair_between_eyes, hair_rings, holding, large_breasts, multiple_girls, naked_towel, original, parted_bangs, purple_eyes, purple_hair, red_hair, sauna, sitting, smile, standing, standing_on_one_leg, towel, towel_on_head, v-shaped_eyebrows, white_hair