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!