The Guardian of Canglan tells the legendary story of Naruto's biological elder brother, Namikaze Canglan, who is five years older. He possesses the "Nether Spring Bloodline" (controlling heavy water for healing and corrosion) and a pact with the Five-Tails (five aspects of Boil Release).
On the night of the Nine-Tails attack, five-year-old Canglan awakens the Five-Tails and uses a water curtain to protect Naruto. The Third Hokage conceals his identity as a Tailed Beast host. Later, he secretly protects Naruto, creates techniques and becomes Jiraiya's student, then makes a pact with the Five-Tails.
During the Chunin Exams, he foils the Sound Ninjas' plan and saves Gaara, then turns the tables on Sasori's trap. He alters his Sage techniques and obtains a forbidden scroll, helping Naruto overcome Sasuke.
In the Fourth Shinobi World War, he defeats the Impure World Reincarnation Mizukage and dons the Ten-Tails' armor. During the battle against Kaguya, he protects Naruto and reveals the Five-Tails. After the war, he turns down the Hokage position and exchanges the Five-Tails for a secret scroll.
He erects a water monument, builds the Waterheart Lodge, and watches over the Ōtsutsuki during Boruto: Naruto Next Generations. The story foreshadows his hidden bloodline, the Seed of Calamity, Kara's covetous designs, and his ultimate technique.
The story's themes are breaking free of destiny, expanding the network of water channels, and reimagining the Tailed Beasts, all while showcasing the meaning of protection.
The subject matter is great! But the content looks so confusing and verbose.