It's Time to Build the Family!Demon Lord Ervin has completed his honeymoon. He even helped to save his wife's pen pal from an invasion by metal monsters. Now, he's back home and ready to enjoy married life... but he still has a promise to keep: wake up the remaining Sin Castles and bond with their spirits. Also, everyone in Libertad wants a piece of Ervin... for good or ill. Can Ervin awaken Envy, Wrath, Gluttony, and Sloth without being consumed by them... or the forces being arrayed against him?