
She join the Vongola Family to buy some time to reborn the Arcobalenos. Just about to end, a singel light of hope appeared. In this arc Tsuna and Yamamota showed their Cambio Forma.
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In this arc Tsuna and guardians got their Vongola Boxes The Arcobaleno Trials Arc, an anime exclusive Arc, happened when Tsuna and his Family traveled back to the past to obtain the Arcobaleno Seals and unlock the true power of the Vongola Rings.

They are later joined by Future Hibari, Future Kusakabe, Lambo, I-Pin, and Chrome. In the second half, Tsuna, Gokudera, Future Ryohei, Yamamoto, and Lal Mirch, invade the Millefiore Melone Base. This Arc introduces the concept of Box Weapons and Rings as the new fighting style. The Future Arc focuses on Tsuna and his Family traveling 10 years (specifically, 9 years and 10 months) by Lambo's Ten Year Bazooka into the Future in order to confront the Millefiore Famiglia and change the Future. In this Arc Tsuna learn Zero Point Break Trough I Edition and II Edition The Varia Arc mainly focuses on the introduction of the Varia, the acquiring of the Vongola Rings, Guardian titles, growth, development, and experience in combat. In this arc, Tsuna learn Hyper Dying Will Mode and got a new weapon " X Gloves "

This Arc transitions the series from an "episodic comedy" to a more action oriented series. The Kokuyo Arc follows Tsuna and his Family's attempt at saving Fuuta from the Kokuyo Junior High Gang.
