1girl, age_of_ishtaria, ahoge, animal, animal_ear_fluff, animal_ears, beach, bikini, blonde_hair, breasts, day, fang, feet_out_of_frame, guna_(age_of_ishtaria), hair_between_eyes, hair_ribbon, holding, holding_innertube, innertube, jewelry, long_hair, navel, necklace, open_mouth, outdoors, red_eyes, red_ribbon, ribbon, saeki_touma, side-tie_bikini_bottom, sidelocks, skin_fang, small_breasts, smile, standing, swimsuit, tail, white_bikini