4girls, :o, age_difference, ahoge, antenna_hair, bangs, barefoot, black_hair, blue_eyes, blunt_bangs, breasts, brown_hair, close-up, collage, finger_to_mouth, flat_chest, green_eyes, green_hair, groin, hair_bobbles, hair_ornament, hair_over_one_eye, hair_tubes, large_breasts, long_hair, lying, multiple_girls, nipples, nude, o_o, on_back, onsen, open_mouth, short_hair, spread_legs, towel, twintails, very_long_hair