The Primo Family Arrives!
Realizing that Tsuna and his friends need to become stronger before facing Byakuran, Reborn arranges for Spanner to send them, along with Yuni, back to the past. As they arrive, the day after they completed the Arcobaleno trials, they are met by the other Arcobaleno, who Reborn has called together to train Tsuna and co. Yuni uses her powers to activate Tsuna's Vongola ring, bringing forth the image of the Vongola First.
Aired 03/04/2010EP 178 - The Primo Family Arrives!
REBORN!
Nowadays, the mafia world is ruled by Italy's strongest family, the Vongola. Vongola's current head, ninth in the row, is an old man ready for retirement. But before he can hand down his position, he needs help from a professional Hitman to prepare the next generation Boss for ruling over Vongola and the mafia world itself.
Sawada Tsunayoshi is just your ordinary teenage boy who attends Junior High and sucks at it. He is unpopular, has no friends, and is desperately in love with a girl from his class. But his life takes an extraordinary turn when Tsunayoshi meets Reborn, an infamous hitman, who the ninth boss of Vongola has sent to train Tsunayoshi for his upcoming title.
(Source: Katekyo Hitman Reborn! FC)