3girls, amakasu_mayo, ass, bare_arms, bare_legs, breasts, brown_hair, collarbone, flat_chest, hair_bobbles, hair_ornament, kawagishi_keitarou, kojima_umeko, large_breasts, leaning_back, long_hair, maji_de_watashi_ni_koi_shinasai!, multiple_girls, naked_towel, night, ogasawara_chika, onsen, parted_bangs, pink_hair, profile, red_hair, short_hair, sideboob, sitting, soaking_feet, towel, twintails, water, waterfall