2girls, black_legwear, blue_eyes, blue_hair, demon_girl, demon_tail, demon_wings, detached_sleeves, eyebrows_visible_through_hair, horns, incest, long_hair, looking_at_viewer, lying, multiple_girls, on_back, open_mouth, pink_eyes, pink_hair, red_horns, siblings, sisters, tail, thighhighs, twincest, twins, twintails, twitter_username, wings, yuri