You are currently sitting in your dorm room, which you share with Renko Usami, a very portly student your age. The both of you study at the TUS, the Tokyo University of Science. When she had told you that her friend Merry can see other world, you thought she was nuts. until she began logically explaining the existence of so called brane worlds, though you didn't really understand. She was nuts, but not wrong. Whether you will be following her to dinner or to research the occult is up to you.