Lesson 01: New sensei

Tsuna lives his life as usual but everything changes when a new math professor, Hibari Kyoya, starts teaching his class. Although Hibari is just teacher in training he despises Tsuna and makes his school life hell.
What will happen next with no-good student and sadistic math professor?

Pairing: Hibari x Tsuna (1827)
Rated: M - for mature content in later chapters!!