2girls, blue_hair, blush, bottle, closed_mouth, collarbone, commission, completely_nude, fingering, groin, hair_between_eyes, kotonoha_aoi, long_hair, multiple_girls, navel, nude, onsen, open_mouth, partially_submerged, pixiv_commission, purple_eyes, purple_hair, red_eyes, same-sex_bathing, shared_bathing, shin_(new), short_hair_with_long_locks, sidelocks, smile, voiceroid, water, yuri, yuzuki_yukari