Yuka and Hinano are friends who have worked for the same real estate company since graduating from college. Hinano, who loves psychic phenomena and was a member of an "occult study group" during her college days, obtained information about the company in secret and uploaded photos of accidental properties on the 2 Channel occult board.

The Underground Empire Badan makes its move, intending to invert the world. Kouta and Mai are pulled through one of these inversions where the discover a boy named Shu, who also holds the power to invert the world. As the Riders fight to protect Shu, Fifteen appears again, seeking Shu. As Kouta flees, past Riders gather and fight one another, split between the Showa and Heisei era Riders. But, the truth of Badan is not as it seems…

Beleaguered police detective Nishi takes desperate measures to try and set things right in a world gone wrong. With his wife suffering from leukemia and his business partner paralyzed from a brutal gangster attack, Nishi borrows from a yakuza loan shark and then robs a bank to clear his debt.

Shinji and Masaru spend most of their school days harassing fellow classmates and playing pranks. They drop out and Shinji becomes a small-time boxer, while Masaru joins up with a local yakuza gang. However, the world is a tough place.

In a bid to bring back life to their town after seeing its population dwindle in recent years, the manager of a shopping mall in northern Saitama Prefecture and the executive director of the Honjo Chamber of Commerce start a project to put together an improvised jazz band from local citizens. A former music teacher (Shimizu Shogo) is coerced into becoming the band leader, but the other prospective members are all elderly amateurs with little knowledge of music.