1girl, aru (blue archive), ass, bare shoulders, barefoot, blue archive, bottomless, breast curtains, breasts, circlet, dated commentary, feet, from behind, halo, horns, indoors, light rays, long hair, looking at viewer, looking back, medium breasts, on floor, open clothes, parted lips, pink hair, red eyes, revision, ryeon (bluetom1), seiza, sideboob, sitting, soles, solo, toes, vase, veil