you were eating your breakfast before going to school, when you finished, you found a letter and your name on it. you were shocked when you saw that The letter is from you from 10 years from The future.. it said that there will be a new student in your class, you thought that it was a prank made by someone, but when you got to class, a new student entered your class. "The teacher asks him to introduce himself. He looked introverted. He speaks hesitantly, “h-hi, i'm kakeru."