Final Decisive Battle! A Conclusion in the Realm of the Kais!!
Tracking the Saiyans across dimensions, Majin Buu arrives in the Sacred Realm of the Kais, bringing the final battle directly to the domain of the gods. Refusing to resort to fusion again, Goku and Vegeta determine who will take the lead against the primal terror. As the opening blow is struck, Earth's greatest champion steps up to engage the creature in a relentless, high-stakes duel.
Aired 03/05/2015EP 53 - Final Decisive Battle! A Conclusion in the Realm of the Kais!!
Dragon Ball Z Kai: The Final Chapters
Since Cell's defeat Gohan has grown up and go to the university then she meets Videl which who has some adventures, then both and his new brother Goten are training for the new tournament, in which Goku came back from the dead for one day. In half of the tournament a misterious persons advice the group about the resurrection of the dangerous Majin Boo, but all plans fails and every one try new ways to stop The dangerous Majin Boo who gets stronger each time. Goku and his friends make everything for stopping them through fights.
(Source: Anime News Network, edited)
Note: Remastered version of the Majin Boo arc that adheres more to the manga's story.