Kyosuke Kosaka's Wonderful Journey

After traveling through countless worlds, Kyosuke Kosaka's greatest wish is for the missions he gets in each new world to be a little more normal. If not, he'd settle for slightly worse rewards... Why keep giving him absurd missions that are practically impossible to complete, but with rewards so good they make his mouth water? It's not like there's any punishment for failing, though... By the way, what's Gilgamesh's famous quote? Kyosuke can only think of tax evasion...