2girls, alternate_breast_size, ass, beach, black_hair, blue_skin, breasts, colored_skin, condom, condom_wrapper, crossover, feet, frills, green_eyes, green_hair, hand_on_another's_hip, holding, holding_condom, large_breasts, light_blush, lindaroze, long_hair, lying, monster_girl, monster_musume_no_iru_nichijou, multiple_girls, neptune_(series), noire_(neptunia), ocean, on_side, one_eye_closed, panties, red_eyes, sand, slime_girl, suu_(monster_musume), tentacle_hair, thighlet, twintails, underwear, very_long_hair