I always thought that this normal, peaceful daily life would continue forever. --- until the day I encountered this incident. Even if I quarreled with her, everything would be fine if I apologized. --- While she did not kidnap a huge red dragon that night. And when I understood it, I was in the strange library. At first I could not understand the situation, but soon discovered that the library is a magic library with books containing everything in the world. I tried to return to the original world - - - where she is - - - However, the book of the world in which I was, was partially destroyed, and I could not return. In an attempt to protect your own world to save her, I went on a journey to correct the book.