When Yume’s pet dog Kyu seems down during a picnic, she enters his dream to find the cause. But once inside, Kyu looks nothing like what she expected.
The story begins when a middle school girl named Yume sees something fall from the sky, and meets a pale violet-colored kitten named Mew. It turns out that Mew has the power of "Yume Synchro" (Dream Synchro), the power to enter dreams. In the dream world, the girl and Mew collect Dream Stones. (Source: ANN)