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!