So Sanji cooked while Zero cleaned people's shoes
(they were both very good at what they were doing). Eventualy they quit, so they started to think which village to join. During the time being in akatsuki, Zero's mother (Kasha) had married to Scarface so he was afraid that if Zero returns, his mother would want a devorce, so he didn't let Zero come back. Instead he decided to kill him but was too lazy to do so. After all Zero and Sanji joined konoha. Danzo, being the Hokage accepted them. After ahile they heard that all Akatsuki members died out of hunger since they didnt have a cook.