Gundam Build Fighters

Even though Reiji has never used Gunpla before, he overwhelms Sazaki's Gunpla with his superb technique; and so, the Gundam Build Fighters are born.

Using Sei's Build Strike Gundam, Reiji wins a total victory in his battle with Gonda; then a crimson Gunpla appears before them.

On the day of the championship, Sei has somehow completed the Build Strike, but Reiji is nowhere to be found.

Mihoshi leaves a strong impression on Sei, and as he advances through the championship, she repeatedly comes to see him.

A young Gunpla fighter, who has already won a place in the World Tournament, visits the store because he is interested in meeting Sei.

Now that Yuuki has suddenly withdrawn from the competition, Reiji has lost his purpose and aimlessly wanders the streets.