A mysterious man arrives at Honnouji Academy and quickly proves himself to be more than capable of fighting against a Two-Star Goku Uniform. But when he sets his sights on Ryuko, who will be left standing?

The final round of Honnouji Academy’s Naturals Election is about to begin and the Elite Four all want to be the first to fight Ryuko. Her homeroom teacher, Aikuro Mikisugi, is concerned if she’ll be able to make it through one fight, let alone all four!

It's graduation at Honnouji Academy, but not everything is as it seems. Ryuko Matoi and the gang must defeat their final enemy.