2girls, ass, black_eyes, blue_hair, border, chibi, chibi_inset, closed_mouth, from_behind, heart, kotonoha_akane, kotonoha_aoi, long_hair, looking_at_viewer, multiple_girls, open_mouth, outside_border, panties, pink_hair, siblings, sisters, sleeveless, spoken_heart, standing, taaru_(taru), underwear, voiceroid, white_border, yes