Tsuna and Reborn go to Hogwarts to become judges for the Tri-Wizard Tournament. Pranking Twins, Golden Trio, Ministry of Magic, Beauxbatons, and Durmstrang; what do all these people want from our infamous Decimo and what do they mean to The World's Greatest Hitman? Warning: OOC, Dumbledore and selective Weasley Bashing (kinda), and I don't own Harry Potter or Hitman Reborn.

After Tsuna became the Decimo of Vongola, he made eight rules for his guardians and Reborn to follow. Being the nice boss that he is, he didn't want to hurt or scare them with the few things, he considered taboo. But his family never learned anything the easy way, and each of them broke one of the eight rules to find out, how kind their boss is, by making those eight rules.