And Then There Were 10 Riders

Plot
In outer space, The 10 teenaged aliens are chosen to be the Alien Riders by their ancestors (one of them was Azmuth) to become the ultimate Earth defenders, and then, they're sent to Earth.

Meanwhile, on Earth, in a Tokyo city, a 17-year-old orphaned girl named Rin Momosaki, with her boyfriend, Vicky Zheng, walks to Raizen High School while starting their 3rd year. In the middle of the road, they attacked by the road thieves, but they're saved by the Alien Riders in their rider form. After introduced by each others, the Alien Riders are changed into their human form. But their transformation devices, Omni-Driver, has stuck in their waist.

After the Riders becomes a 3rd year student, 3-1 teacher Tamae Okamine, and Rin's other classmates sees the Riders belt and very happy because they're the Kamen Rider and Ben 10 fan (just like Rin).

While Rin and the Riders going home, they're been bullied by Vicky's "friends". Later at night, the bullies are attacked and had a serious injured, because the Riders are showing their powers.

After the bullies are suspended for 3 weeks, later that night, the Riders sees the bank robbers and going to defeat them.