She teaches comparative physics at the University. She doesn't look it, but she's already 18, which is
quite young to be a professor. In Yumemi's world, all the forces such as gravity, electromagnetism, and atomic
power have been resolved under a unified theory, which has been proven to explain all known forces in
the world. Yumemi believes there may be a force that doesn't fit in this theory - "magic". However, when
she announced her theory to the academic community, she became a laughingstock.
Yumemi came to this world to get even with the academy, but...