1girl, ass, blue_eyes, blue_hair, blush, bra, breasts, ciel_(tsukihime), dress, from_behind, long_sleeves, looking_at_viewer, medium_breasts, nervous, official_alternate_costume, short_hair, solo, tsukihime, tsukihime_(remake), underwear, undressing, vent_vert_(kuuya), white_background, white_bra