Anime

The world is managed by the World Government《World Governance Mechanism》, due to the intense temperature rise, it was recommended for robots and androids to do the labors humans needed to do.

Therefore—— Here is a certain "empty house".
In the share house long forgotten by people, four masterless androids; Cobalt, Kei, Chrom and Neon live there.

——A problem came for those four.
"Not having money for electricity bill means―― We can't charge?"
"That means…… A forced shutdown!?"

To pay for electricity bill, they challenge
entertainment tower "Babel" which stand as the symbol of the new age.

"Babel" is a place where artists, namely climbers, unfold enthusiasm for climb stage, in search of moving emotions, they challenge themselves to the peak(top).
It was an entertainment tower of hope newly discovered who has lost the joy of light.

In Babel, where the absolute king STAND-ALONE reigns,
the androids clear the stages using their singing performance while earning prize money.

On the way home after their first challenge in Babel, they met a genius boy.
The moment they touched the boy's "heart", a special program suddenly activated in four of them―

Humans and androids, the past and the present, when the entwined threads of fate unravel,
Is their singing voice echoing despair or hope?

When these four androids had a fateful encounter with a genius boy, Esora,
An unknown door opens to the future of humans and robots―

Now, their songs echo in the hearts of humans who have forgotten their dreams.

"It’s okay. We’ll surely meet again.
No matter how hard it becomes. —To get your hands on fate."