1girl, arcueid_brunestud, arcueid_brunestud_(cosplay), blue_eyes, blush, cosplay, hisui_(tsukihime), kagetsu_tooya, long_sleeves, looking_at_viewer, lying, navel, on_bed, purple_skirt, red_hair, short_hair, skirt, sleeves_past_wrists, solo, stomach, sweater, tsukihime, turtleneck, turtleneck_sweater, vent_vert_(kuuya), white_sweater