After The Majin Buu Saga
The 28th Budoukia has begun and Gokou, Vegeta, Trunks, Goten and even Pan have entered. Gokou is excited because he wants to fight the reincarnation of Buu named Ubuu. After Pan won her first round Gokou and Ubuu fight. In the end Gokou asks to train Ubuu so that he would one day become the protector of earth.