Suterare Kishi no Gyakutenki! ~Megami to Hajimeta Daini no Jinsei wa Densetsukyuu no Eiyuu datta ken~

Framed for embezzling the Royal Guard's funds, aging commoner knight Alfred loses everything and is exiled from the kingdom he served for decades. At his lowest point, a goddess appears to grant him a second chance at life—one where he will rise from disgrace to become a legendary hero.