A seemingly ordinary Japanese high school student named Yumimi Yoshizawa sees a strange dream about a unicorn couple in a magical land. When one of the unicorns suddenly falls through a hole in the ground, Yumimi wakes up, realizing she has fallen out of the bed as well. The following day brings more strange occurrences, such as mysterious hopping blobs and a strange girl who professes her love to Yumimi. Eventually Yumimi and her friends realize that all these events are connected and that it lies in their power to protect our world from monsters.