Kamen Rider Zi-O

Sougo Tokiwa seems like an ordinary high school student, but one thing he has different is that he has dreams of becoming a king! One day, a mysterious young man appeared before him with a prophecy. "Congratulations! Today is a special day for you..." As Sougo is told these words, a giant red robot suddenly appears before him! This robot was a time machine, and Sougo was thrust across various timelines! In the year 2000, the battle of the Heisei Rider's fate, and Sougo's fate in his own birth year, is about to begin...!

Sougo is attacked by a Kamen Rider from the future, Geiz Myokoin, but is saved by a girl from the same future Tsukuyomi, who wishes to help him out. With no clear idea of what is going on, his confusions are further pushed with frequent visits from the mysterious prophet named Woz. Meanwhile Another Build is wreaking havoc, and Sougo discovers that the key to defeating this "Kamen Rider Build" is to meet Sento Kiryu.

Geiz and Tsukuyomi reluctantly collaborate with Sougo, even going as far as to keeping a keen eye on him at school. Meanwhile, a seemingly "unbeatable" game has gone viral amongst the students at Sougo's school, with rumors saying that there is only one person who would be capable of beating it. The three set out to find this rumored genius gamer M, but they encounter an enemy Time Jacker named Ora.

Sougo and the others find Emu Hojo, also known as Kamen Rider Ex-Aid and engage in battle with him. However with the appearance of Another Ex-Aid, Emu memories and powers are stripped from him. Despite so, Sougo needs to somehow gain Emu's trust in order to gain the Ex-Aid Ridewatch and defeat Another Ex-Aid.

Geiz and Tsukuyomi investigate a case of young girls mysteriously disappearing from Amanogawa High School, and are confident that an Another Rider is involved. When their suspicions are proven true, they receive a handful of support from the school's Kamen Rider Club .

With Another Fourze also possessing the powers of Another Faiz, Takumi Inui appears to stop Masato Kusaka and help Sougo investigate the case. As they continue searching for answers behind the mystery of Another Fourze/Faiz's target Karin Yamabuki, they discover a connection with the Ryusei School.