Kato Taro, an unmarried, middle-aged salaryman, woke up and found himself in a different world full of deserts called the 『Great Desert.』 He was summoned as a 『World Reformer』 to improve the world, but the king, seeing Taro as a dull, middle-aged man, declared the summons a failure and gave him a notice that he was no longer a force to be reckoned with. A short time later, Taro, who was banished to another city, boards a sandship, and the ship is attacked by a swarm of monsters called Sand Beasts. This was a conspiracy by the king to kill Taro and call a new 『World Reformer』. Taro escaped and wandered around the desert, until he met a beautiful girl in an uninhabited oasis. Lalabelle, the king little sister who is a princess, and Miu, her attendant. Lalabelle, who is an outstanding swordsman, and Miu, who is also a skilled wizard, were exiled from the kingdom under the guise of granting the oasis as their territory. Taro, Larabell, and Miu travel through the desert together, but finally a special skill appears in Taro, who was thought to be useless as a Reformer.... 「In other words, when I defeat a sand beast, I can save up a number of money and make whatever purchases I want within that amount.」 「That's a wonderful ability.」 The three of them earn money by defeating sand beasts and shopping with Taro's 『Internet Shopping』 skill, while continuing their journey to keep the Kingdom of Bart from knowing about their survival. What will be the destination for Taro and his friends? Furthermore, there is no problem even if they dont understand the mystery of this world, this is a story about an old man who is sent to another world filled with desert and live as he wish.