Nobunaga the Fool

The story centers around Saburou, a high school boy who time-travels to Japan's Sengoku Era. He must become Nobunaga Oda, the famed warlord who helps unite Japan.

In the late Edo period, Japan had experienced an unprecedented crisis by Kurofune (Black Ships), the ships from foreign countries. But a giant robot called Onigami, which has existed since ancient time, dispelled the Kurofune ships and the exclusion of foreigners was accomplished. The story begins in Japan where Meiji restoration in 1868 didn't happen. The tagline says, "I can be the greatest man in the world, because I am a virgin!!"

In the year 1580, a man named Lord Nobunaga Oda sends hoards of unholy armies across Japan, slaying all who stand in their way. A young ninja escapes her villages' destruction with a short sword, one of the three mystical weapons that can end Oda's rule. During her quest, she is joined by two other ninjas who wield the other two weapons of legend, the sacred sword and spear.

Shio Ogura, a seemingly normal Japanese high school student, who, while visiting Taiwan on a school trip, is suddenly attacked by monsters. Agents known as "E-Gene Holders" from the government agency DOGOO also arrive, who wield weapons infused with the spirits of historical figures. However in the midst of it all, Shio is revealed to also be an E-Gene Holder when the soul of Oda Nobunaga awakens after she tries to rescue a friend.