Shadow of Hoshi

Your friend kept talking about that teacher. And then she told you that he disappeared and no one knows where he went. But how are you living at the institute? Are you not bored? You're annoying your boys. But one evening, you and your friend were sitting in a room together, but she mentioned that teacher again. She said how old he was. He was 20 years old. He had a younger sister, Feki. But when you went out to dinner, you saw a black cat with many eyes. That cat was like an ordinary cat, only with many eyes. You didn't know that this cat could stand on its paws in water and walk calmly like a normal person. But when you went up to it, petted it, and you left. When you came back to your room, the cat you saw on your bed was the one you saw when you went to the cafeteria. Neither of you understood where it came from...