Lost Temples of the Sage
Assassin's Creed x Naruto
Pieces of Eden in Konohagakure

After his clan is massacred by Itachi, Sasuke visits the Memorial Tablet in the Uchiha Shrine. With his immature Sharingan, he reads the text and sees that some of the hidden writings hint towards an incredible power that can only be achieved by combining the Senju and Uchiha flesh/bloodlines together. But as he's about to leave, Sasuke notices something strange at the bottom of the Tablet. Tipping it onto its back, he discovers a new secret scratched into the bottom. Secrets that tell of a treasure of the Rikudou Sennin that could control people (even the Juubi itself) and that it taught the Sennin how to access and use chakra, and that were numerous other treasures like it hidden throughout the world.

Going to the Konoha and Uchiha Libraries, Sasuke researches the Rikudou Sennin and finds faint hints that correspond with the secret Tablet text. In one of the few surviving artistic renditions of the Sage, he was shown carrying a shakujo (Buddhist ringed staff) and glowing sphere. The shakujo can be combined with the Apple to amplify its power, how the Sage controlled the Juubi. Plus, the Sage also carried six Temple Keys disguised as magatama around his neck. These Keys opened temples scattered throughout the lands that contained various forbidden artifacts and/or knowledge within them.

Realizing that he may have discovered some rare weapons or knowledge that could help him avenge his clan, Sasuke begins trying to find a way to leave Konoha without arousing too much suspicion.

Sasuke is eventually joined by Naruto, Hinata, and Neji on his quest. Hinata had gotten the Hyuuga Council so angry at her that she truly feared for her life and ran away. Neji had to follow her since he was her bodyguard. Naruto followed Sasuke because he was trying to make friends with him and he noticed that Sasuke was looking to go on an adventure outside of Konoha. Fleeing Fire Country, they bumped into the ninja hermit Roshi who was wandering through the Land of Rivers at the time. With his help, they were able to throw off the pursuing Konoha ANBU. Afterwards, Roshi became interested in seeing just what this group of children was hoping to accomplish and he decided to accompany them. He became their protector for the beginning of their journey after Sasuke offered him payment using the Uchiha fortune. Roshi also began teaching them basic ninjutsu, taijutsu, and genjutsu so that they could be more independent from him.

When they reached Sunagakure, they befriended Gaara and his uncle, who introduced them to Temari and Kankuro. When they decided to leave after a month's time, the Suna Siblings were hesitant to let them leave. But their uncle took mercy on them and helped them get out of the village to accompany the group, believing that they'd live happier growing up away from the pressures of the ninja village (he was later executed for treason for this when it was discovered he had a hand in it).

They journeyed far west into uncharted lands, where Sasuke remembered the text describing the location of one artifact. With a bit of Naruto-style luck, they find the Temple and the artifact within (Apple of Eden). After some time studying it, they discover how to use it and what it can do. They each learn their own special brand of ninjutsu from the Apple and they accidentally unlock a holographic map to the various other temples scattered throughout the world. Intrigued, they decide to visit each Temple and try to unlock their secrets.

Five years later…

The Oyashima (as they began calling themselves) return to the Elemental Nations after sailing the unexplored far southern oceans. They landed in Nami on their way to Whirlpool. While there, they decide to help out with the situation there. They seized his company and transferring ownership to Nami, killing Gato, and bringing peace to the islands again. It turned out that Tazuna had used his money to trick some Konoha Chuunin team into making the journey completely pointlessly. But while they are in Nami, supervising the bridge construction and protecting it from the random angry thug who was suddenly out of a job, the Chuunin heard rumors among the people of Nami about a group of ninja children who'd recently landed on the island and carried many strange and exotic items. One of the Chuunin went to the market and was able to recognize Roshi as an old Iwa-nin and he had a strong suspicion that two of the kids were Hyuuga.

As they reached Whirlpool and discovered the seventh and final Temple, the group found themselves greeted by the 'spirit' of the Rikudou Sennin himself. The spirit explained that only when someone possessing his shakujo, the Taiyoudama (Sphere of the Sun, Apple of Eden), all six magatama, and the Ame-no-Murakumo-no-Tsurugi (Sword of the Gathering Clouds of Heaven, Kusanagi, the only item they were missing) could they enter this 'Grand Temple' and learn the tragic truth of the ninja origins. The 'truth' interested all of them and they set about trying to find the lost sword.

Roshi, having heard of the Ame-no-Murakumo-no-Tsurugi, quickly remembered that the last person he'd heard of having it was Orochimaru of the Sannin under the name of Kusanagi-no-Tsurugi. The Oyashima finally set their sights on returning to Konoha after they hear that Orochimaru's village has entered the Chuunin Exam and Orochimaru would most likely be attending. They didn't think they'd be able to steal it from him so they mostly went to measure his ability and (for some of them) to return to their home village briefly.

They each carry a different item to help protect them in case one of them ever get robbed. What they found in each of the six prior temples was various ancient knowledge on chakra, different elemental jutsu, forbidden and ancient sealing techniques, lost histories of the world prior to the Rikudou Sennin and Juubi's times, and special chakra-compatible weapons and tools.

Sasuke still desires to avenge his clan by killing Itachi, but he's much more aware of how his actions affect others. Naruto, Hinata, and Neji see the whole thing as a grand adventure to solve the ancient mysteries the Sennin had left behind. Gaara, Temari, and Kankuro are just happy to be with friends and out of Sunagakure, where they'd be pressured to become coldblooded killing machines by the father. Roshi sees tremendous potential in each of the kids and wants to guide them on their way, knowing that they'll have a huge impact on the world (for better or worse) and he wants to see what they'll become.

Naruto = 12, wears a magatama
Hinata = 12, carries the shakujo
Gaara = 12, wears a magatama
Sasuke = 13, wear a magatama
Kankuro = 14, wears a magatama
Neji = 14, wears a magatama
Temari = 15, wears a magatama
Roshi = 48, possesses the Apple