Yamato's Agent of Autumn, Nadeshiko Iwaizuki, was enjoying spring with her beloved retainers: guard dog Hanakiri, head maid Miyabi Sanekazura, young aide Koyoi Shirahagi, and her first love and Guard, Rindo Azami. But their peaceful days are shattered by a request for a diplomatic meeting in a foreign overseas. Young Autumn accepts, but she has no idea the tangled web of intrigue that awaits her across the ocean...