Kamen Rider Zi-O Spin-Off Part 1: Rider Time Ryuki (2019)

Both consists in a Kamen Rider spin-off web series that are connected not only with the current series at the time (Drive and Zi-O), but also with some prior shows of the franchise. They are like some sort of a sequel for the previous ones: Kamen Rider 4 for Faiz/555 and Rider Time for Ryuki.