Collaboration anime between Gintama and Monster Strike.

In episode one, Ginrei's dress is stolen, only to be used to fool the enemy. The second episode deals with a giant robot made exactly in her image. Finally, the third episode concerns Tetsugyu and Ginrei investigating a lost research team in a "wild west" desert setting.

Ken, Joe, and Akira, three high school students, must combine their three mecha into Gekiganger III to defeat the evil Prince Akara and Emperor Hyperion. The OAV is a compilation of the scenes from Nadesico, a new "movie", and is a parody of many mecha series from the 80s.

There is a World Beautiful-Skin Competition (WBC) to which the 3 billion women of the world aspire. Carrying on the 300-year legacy of the competition are the twin Bihada sisters, Sara and Saki.