|"Sea", "Shellfish", and "Rainbow"|
Umi Kai Niji
|Arc||Future Final Battle Arc|
|Volume||Tsuna vs. Byakuran Arrives!|
When the Rainbow Fades
Seeing Giotto with Tsuna, Byakuran begins to laugh, saying that it's not the time to project ancient ancestors. However, Yuni believes that he is real and thinks that Byakuran knows it too. Yuni reveals a song she has known since she was young that states The Sea knows no bounds. The Clam passes down its form from Generation to Generation. The Rainbow appears from time to time before fading away. She explains that it's a song about the Vongola, Mare, and Arcobalenos and their role in the Space-Time Axis.
Giotto then starts to remove Tsuna's shackles, explains that the current form of the Vongola Ring is only temporary, and reveals the existence of a restraint that restricts the output of flame from the ring. Giotto then lifts the restriction on Tsuna and his guardians' rings, turning them into the Original Vongola Rings, and disappears after telling Tsuna to give Byakuran what he deserves. Byakuran laughs and charges at Tsuna with his White Dragon. With his new ring, Tsuna is able to match Byakuran's strength and damage him with his Burning Axle even though Byakuran used his White Applause. Tsuna then grabs Byakuran's wings and rips it off his body while Byakuran falls to the ground due to Tsuna's attack. Byakuran recovers and is happy to be able to use his full power against Tsuna and grows a pair of black wings...