Tale of a Gutsy Ninja - The Jiraiya Ninja Chronicles

During the reign of the Second Hokage, the young Jiraiya, Orochimaru, and Tsunade are assigned to Hiruzen Sarutobi’s platoon as Genins. Fascinated by Sarutobi’s summoning jutsu, Jiraiya immerses himself in mastering the transportation technique. While training, Jiraiya accidentally transports himself to Mount Myoboku, opening the path to fulfill his destiny.Source: crunchyroll