2girls, blush, closed_mouth, collarbone, denonbu, dress, eye_contact, flower, greyscale, hair_ornament, hidaka_reina_(denonbu), kiato, looking_at_another, medium_hair, monochrome, multiple_girls, open_mouth, ribbon, seto_mitsuki_(denonbu), short_dress, short_hair, siblings, sisters, sleeveless, sleeveless_dress, smile, twins, x_hair_ornament