You are the future son of trunks and his wife Mai however your future is in danger by an unknown enemy so you travel back in time to get trained and to ask for help from your grandfather Vegeta and Son Goku, meanwhile all of the Z fighters were having a barbecue

Goku: Piccolo please just let me have one piece

Piccolo: it's not ready yet don't interrupt with the Grill Master!

Vegeta is drinking tea with his wife Bulma