1girl, ass, back, bed, blush, bow, bow_bra, bra, breasts, brown_eyes, brown_hair, elf_(stroll_in_the_woods), from_behind, looking_at_viewer, looking_back, medium_breasts, mirror, on_bed, open_mouth, panties, reflection, senki_zesshou_symphogear, short_hair, shoulder_blades, sitting, socks, solo, tachibana_hibiki_(symphogear), underwear, underwear_only, undressing, wariza, yellow_bra, yellow_panties, yellow_socks