Kamen Rider Ghost (2015)

Ex-Aid is the series following Ghost so if you want to watch the Kamen Rider seasons in order watch Ex-Aid after Ghost.

Ghost is the series following Drive so if you want to watch the Kamen Rider seasons in order then watch Ghost after Drive.

Both series are Kamen Rider series that have Takuro Fukuda as the head screenwriter.

In both series, there is an other-dimensional world, which creates situation in which the heroes are needed. At some point, there is also a race/purpose to gathering the henshin items (eyecons and ridebooks/seikens).

There is a crossover series between the two series.