2girls, ass, bikini, blonde_hair, blue_eyes, breasts, brown_eyes, brown_hair, eyewear_on_head, from_behind, innertube, katou_megumi, long_hair, looking_at_viewer, looking_back, multi-strapped_bikini, multiple_girls, pool, red_bikini, saenai_heroine_no_sodatekata, sandals, sawamura_spencer_eriri, short_hair, side-tie_bikini_bottom, small_breasts, striped, striped_bikini, swimsuit, twintails, unfinished, unworn_eyewear, yanagi_marie