How Not To Summon A Hero

How to Summon a Hero is a story unlike any other. The summoned stories typically are based on the main character being pulled into another world, saving this world, getting the girl, and living happily ever after. However, our main character has done this already and now has his happily ever after ruined. Not only that, he's being summoned by the people responsible for their own problems. He refused the offer and wishes to return to his happily ever after but now must face being branded an outlaw. All he wishes is to be reunited with his precious wife, and he will do anything, even strike a deal with the Demon Lord he is summoned to kill. Yet there is more to be revealed such as "Why him?" "Who is truly to blame for this all?" "Will he ever be reunited with his wife?"