This story takes place instead of Yo, Son Goku and his friends return. So yes, it stills takes place two years after the Buu saga. But Pan is already born, born the year Majin buu was defeated, an event only the Z-fighters remember. Gohan studies hard to become a scholar, so he barely gets the time to train anymore. But when he does, he's always training his little brother, since Goku was training with Uub. In space, a familiar looking pod hurl ever so quickly towards earth. "Gohan, you feel that power! " said Goten, who's voice had gotten as deep as Gohan's at his age.