Multi-Frequency Space Ship

"Hello, welcome to our space ship. From now on, you will be the captain of this battleship." When you first came to this strange place, an even stranger person announced your future destiny. You have no way of knowing what your future will be like. You asked him why you came to this place, but he didn't answer you. He just threw a thick book on the table and left in a hurry after saying confusing words like "This is your destiny." You had no choice but to pick up the book on the table. When you saw the title on the cover, you were stunned. It actually said... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.