Kamen Rider Zi-O: Special Event is stage show of Kamen Rider Zi-O. The stage show was performed live on May 4-5, 2019, and was released on DVD on September 11, 2019.

Set in an alternative world of Bungo Stray Dogs, this "what-if" story imagines if Atsushi Nakajima was in the Port Mafia and Ryūnosuke Akutagawa was in the Armed Detective Agency, instead of vice-versa. The story follows Ryūnosuke Akutagawa, who vows revenge on a man dressed in black in order to rescue his sister. However, as he is about to starve to death, a man from the Armed Detective Agency appears.

The stage of this work is Saitama, a suburb of Tokyo in the early Heisei period. Immediately after the bubble burst gangster countermeasures law, there were gangsters who defended the last territory and young people who freely controlled the city. The youth conflict escalated day by day and became a force that surpassed the yakuza, and the runaways were sent to juvenile prisons one after another, where exclusive rules awaited.

Schoolteacher Yohei is married to Miyoko. For the first time in 25 years they begin to live by themselves when their son marries and moves out. Then Yohei discovers that all’s not well in his marriage.

The story follows Nozaki Haruka, a middle school student who transfers to a new school in a small town because of her father's work. Unfortunately, she becomes a victim of horrific bullying, but since the school will be closing in 2 months after graduation, no one is willing to help her.

In the Hyper Battle DVD, we will discover that Geiz is afraid of ghosts. This gained him a new form, the Bibill Ride Watch to transform into Kamen Rider Bibill Geiz (Wimp Geiz).

It's September 2018, and a group of high school students are more than ever excited to pursue their dreams. Sougo Tokiwa wants to become a desirable king, and Keito "Geiz" Myokoin works tirelessly to become the true judo champion while trying to impress his crush, Alpina Tsukuyomi. However, one day Geiz suffers a career-ending injury during a judo match in a judo tournament, forcing him to give up his dream of become a judo champion. While still grieving, he was met by a mysterious man, who wanted to give Geiz a Ridewatch and a Driver. "My name is Woz, I came here to guide you to become a savior. If not, Sougo Tokiwa will become the worst and evillest demon king." Meanwhile, a new transfer student leads him to nothing but one grand conspiracy.

Tamaki got disheartened when she was sent to the Percussion Division of her catholic Music School. There she overheard a Girl playing Wadaiko Drums. She was instantly captivated. So she decides to try playing them seriously.