What are you, really?

One day, a mysterious classmate named Woo Young-hee suddenly appears out of nowhere.

She doesn’t seem quite human...

Young-hee is actually a robot who came to school to learn about human emotions.

Cheol-soo decides to help her understand them

But the more time they spend together, the more Cheol-soo begins to feel something for her—something he can't quite explain in words...

A heartwarming tale of a world meant only for the two of them—where no one else can enter!