Yoji, Kei, Kelly, and the bear-shaped robot Oscar save the town yet again using Fastening Machines! This time, they meet a kindhearted young boy named Samhen and his AI robot Jack. Shy Samhen, who transfers into Kei and Kelly’s class, doesn’t seem to like talking about himself much, but his chatty little buddy Jack is more than happy to help him communicate. One peaceful afternoon, the young heroes must protect the town from sudden and serious danger! Will they be able to save everyone? Pay attention to the bond between AI and humans, which the children take action to protect!

Yoji, Kei, Kelly, and the little bear-shaped robot Oscar are small heroes who must save the town. Today is Yoji’s birthday, but this doesn’t seem to excite him. Whether or not they know this, Kei, Kelly, and the woman who raised him as her own, Anna, seem to be planning something. And that’s when it appears over the city – an out-of-control sightseeing airship! Our little heroes must face their biggest challenge yet! The action-packed drama even includes an evolved Fastening Machine! Will our heroes be able to fasten the town’s future? What will become of Yoji’s birthday? There’s only one way to find out!

In the previous story, Yoji and Kei rescued Anna, their adoptive mother.
Now, they are once again using the Fastening Machine with Oscar, the bear robot, to solve any problems the town is facing.
One day, however, a mysterious hero makes her appearance.
And she happens to have the same Fastening Machine as Yoji and Kei.
Who is this she? Why did she appear?
Just then, a big problem hits this peaceful town!
Will these small heroes be able to save the town from a crisis?
This is a near-futuristic action anime taken to the next level! Don't miss it!

Yoji and Kei, a boy and girl,
live in a town in the not-so-distant future
with their foster parent, Anna.
But these seemingly ordinary children have a secret hidden even from their unsuspecting mother:
Yoji and Kei are superhero defenders of their town!
With a flap of their capes, the two of them and their robot bear sidekick,Oscar,protect the citizens in their town with their handmade high-tech machinery.
But from what menace?
And will our little heroes be able to overcome the
crisis about to threaten the town's peaceful everyday serenity?
Check out this utterly electrifying near-future animation to find out!