The Only Exception

Song fic. Tsuna is the only exception. But why? How? Take a look at segments of Hibari Kyoya's life since primary school. Parents, murdered, by one another; learning about what kinds of animals eat what; isolation; friendship; old friend(?) returns; Vongola Guardians-sorta; love; and The Only Exception. Song by Paramore. Story is better than the summary, I promise. 1827