Kamen Riders Build and Ex-Aid team up with the legendary heroes of the Heisei Generation – OOO, Fourze, Gaim, and Ghost.

Problem student Haru Yoshida sits next to the cold and studious Shizuku Mizutani in class. Without any other friends to turn to, both of them start to get to know…

21-year-old Junpei is a low ranking gangster. He is busy taking care of miscellaneous works. One day, his boss gives him a mission to kill a high ranking gangster from…