In an alternate Japan, the Tokugawa shogunate did not lose the Boshin War at all; it preserved and strengthened its power. During the World Wars, brave samurai simply cut down the ships and planes of Western barbarians, and at the beginning of the 21st century the country successfully continues a policy of chauvinism and isolation. At the foot of sacred Fuji stands Buo Academy, where the future elite of the nation is trained, equally skilled in using katanas and mobile phones, naginatas and digital cameras. The School Council is headed by the heirs of the 25th shogun – Yoshihiko and Sen Tokugawa. Martial arts are one of the main subjects at the academy, which is why 16‑year‑old Munekaira from the Yagyu family – court instructors of the sword path – is transferred there. However, upon arrival the young samurai immediately fell into a mysterious story involving strange prophecies, grim dungeons and enigmatic girls falling from the sky. By receiving his first kiss in this way, the hero earned many hot looks not only from his childhood friend, Princess Sen. Considering that almost all Buo beauties bear the names of historical heroes, share their virtues and flaws, and are additionally impossibly cool, one cannot envy poor Munekaira. And good would only act in the series those who have changed gender and appearance, well‑known to Yubey Yagyu, Sanada Yukimura or Hatōri Hanzo, but what does that have to do with you, chevalier D"Artagnan?