2girls, animal_ears, black_hair, blush, brown_eyes, colonel_aki, comic, comiket_100, cover, cover_page, doujin_cover, earmuffs, head-mounted_display, houraisan_kaguya, instrument, long_hair, looking_at_viewer, multiple_girls, open_mouth, pantyhose, patchouli_knowledge, piano, rabbit_ears, skirt, smile, touhou