The Hero Took Everything from Me, So I Partied with the Hero’s Mother!勇者に全部奪われた俺は勇者の母親とパーティを組みました！

A young man wants to marry the mothers of the hero's party As a member of the hero's party Ceres, the main character, set out to defeat the demon king. But one day, he was suddenly dismissed by the hero, and he had to leave the party. All alone, Ceres sought to find a domestic slave to take care of him. What he saw at the slave market was Ms Shizuko, the mother of the hero, sold as a slave?? The unreasonably expelled young man's Isekai mama harem is born!!