We start off in a timeline where Chi Chi didn't move out of the Fire Mountain kingdom so that she would instead maintain her destiny as the heiress of her throne. It's also an alternate timeline where Gine went to Earth with Goku and appointed Grandpa Gohan to be his legal guardian. Gine went to Kami's lookout for permanent residence so she could see her son, Kakarot, better known as Goku, in times of need. After his marriage to Chi Chi, Goku became the prince of Fire Mountain. Raditz and Nappa reside at Kami's lookout too. Vegeta is still married to Bulma. Gohan is currently 11 years old and a school student. So now, Chi Chi is pregnant with Goten and Bulma is pregnant with Trunks. They are both currently 8 months pregnant together and due on the same day. Piccolo is now Ox King's vizier and Goku's right hand man. This timeline is set after the cell games. Grandpa Gohan has sadly passed away from old age. So Kami says, enjoy.