Time traveler Calen is hopping through time, trying to get away from Akudarma Trio. After a direct hit, she is forced to crash land in 2016 and encounters a boy named Tokio. The Akudarma Trio is right behind, so she has no choice but to take Tokio with her to the 24th century to escape. There, Tokio finds out that Calen works for the JKK, an organization that travels through time, trying to find out the True History. Tokio then finds himself travelling with Calen to Ancient Egypt to find out the truth about Cleopatra.

This time, it's the True History about Halloween. However, the place they arrive is the Tottori Desert in the 4th year of the Meiji Era. Tokio and Calen meet the host, Fukuzawa-san, who they think they've seen before. Apparently people mistake Tottori and Shimane quite often, so he holds a quiz about them. It starts on October 31st... Wait, does that mean "trick or treat" was originally "Tottori or Shimane"? Akudarma won't allow for such a punny history, so they also participate in the quiz...

Tokio and Calen go back to Spain in 1492 to find the true history about Columbus and his journey to find the new continent. However, when they find him, they realize he has no interest in a new continent, but is trying to discover the next new exercise...

Tokio and Calen arrive to New York in the late 1800's to discover the True History about Seton's Animal Chronicles. When they arrive, they find out that Seton isn't trying to chronicle animals, but donuts instead...

In order to find out the True History about Gagarin, who was famous for saying that the Earth was blue, Tokio and Calen head back to the Soviet Union in 1961. They find some astronaut trainees and immediately find that Akudarma is already there. Gagarin comes in between them, saying that it's not right to fight underneath the blue sky, but he seems extremely interested in Tokio. Apparently, he really likes the color blue, but... This time, they can't seem to find a True History signal very easily, so the head to Space with Gagarin. Just what is the True History this time?

Tokio and Calen arrive to Tanegashima in 1543 to when guns first arrived to Japan. What the Europeans actually brought were... actually underwear?! However, Akudarma actually steals the underwear and at this rate, they won't be able to witness the True History. And so instead, they use... Tokio's underwear?! His underwear ends up becoming a hit throughout the town. Despite it being their mission, Calen couldn't help but feel conflicted about it. Apparently there was something strange about the lord of Tanegashima, as well...