Yuusha ni Zenbu Ubawareta Ore wa Yuusha no Hahaoya to Party wo Kumimashita!

After traveling and fighting their way to beat the evil demon king, Ceres' adventuring party kicks him out! Dismissed by the womanizing hero he had thought of as a friend, Ceres is now all alone. Worse yet, he's not actually from this world; he was reborn here with all his memories of his previous life still intact. Now alone, he heads to the market and sees someone he never expected—Shizuko, the hero's mother, rejected and up for sale. After hearing her story, Ceres decides to form his own adventuring party with the mothers of his former companions!

(Source: Seven Seas Entertainment)