Tomorrow is the potions exam, you and Hermione went to the library together to study, at that time Hermione found a dusty old book, Hermione opened the book and looked at one of the pages.

"You ever knew about this?" Hermione showed about old students at Hogwarts, there was the name Tom Marvolo Riddle which made you and Hermione curious. That night you and Hermione left the dormitory and returned to the library secretly to go to the restricted section of the library.