Naruto Travel Between Worlds Of One Piece Novel

In the Naruto universe, the protagonist is reborn as Naruto Uzumaki himself. As a baby, he witnesses dimensional rifts caused by the Flying Thunder God Technique and Kamui's phasing effects, which tear open a portal to the One Piece world. Through this tear in space, he obtains the Door-Door Fruit, a Devil Fruit that awakens the Gate of Worlds within his consciousness. Before departing Konoha, he secretly gathers knowledge throughout the village. He then enters the One Piece world to master Armament Haki, Observation Haki, Conqueror's Haki, and the Marines' Six Powers techniques. Upon his return to Konoha, the blonde-haired boy now commands a steel-hard body and overwhelming combat abilities. He demonstrates his newfound strength by demolishing the Hokage Building with his fists and destroying the Root Division with his kicks. He challenges the Fourth Raikage to test their Armament Haki, proposes arm-wrestling with Tsunade, and boldly pursues Mei Terumi.