Dragon Ball Kai (2014) - episode 1 - 05 Apr, 2014

Seven years have passed since the battle with Cell. Gohan is now a high school student attending Orange Star High School in Satan City. On his way to his first day of school, he comes across a bank robbery in the city and stops it with his Super Saiyan form. As rumors spread about a "Golden-Haired Warrior", Gohan gets to know his new classmate and Mr. Satan's daughter, Videl. After a day of trying not to act suspicious in front of his classmates, Gohan approaches Bulma, who gives him a transformation watch to hide his true identity. (Source: Wikipedia)