I Was Made to Cry by the Genius Junior Classmate's Routine.

On the first day of school, I cornered the talented student who was famous throughout the school in a corner of the library. "Don't move, help me make up for the advanced math." He lowered his eyes and chuckled: "Senior, you can make up lessons, but you have to charge interest." Later he pressed me between the bookshelves: "The interest has been collected, now it's time to collect the principal." My legs were weak and I supported the wall: "What principal?" He bit the tip of my ear: "You."