2girls, adapted_costume, album_cover, bat_wings, black_legwear, blonde_hair, bow, cover, dress, fang, flower, hair_bow, hair_flower, hair_ornament, light_purple_hair, looking_at_viewer, lying, multiple_girls, no_hat, no_headwear, on_side, open_mouth, petals, pink_eyes, pink_skirt, red_eyes, ribbon, shirt, siblings, side_ponytail, sisters, skirt, skirt_set, sleeveless, sleeveless_dress, sleeveless_shirt, smile, string, string_of_fate, thighhighs, tongue, tongue_out, upside-down, wings, wrist_cuffs, wrist_ribbon, zettai_ryouiki