Atlas, who works for a major guild, has the unique skill "double return". He doubled the damage he received and returned it to the enemy, doubled the support magic he received and returned it to his friends to contribute to the party. However, one day, Captain Tony kicked him out, saying, "I don't need the incompetence to receive only damage." Alice, a younger sister who saw such a pitiful appearance, recommended a job change test to the guild of the kingdom, and Atlas was suddenly selected as the captain of the S rank party! Captain Tony failed to capture the dungeon because Atlas disappeared. However, it will be demoted to C rank. He sits down on the atlas and cries, but it's too late. Atlas, who was having fun in the kingdom's number one guild, dismissed Captain Tony's plea-a different world fantasy that has made a big turnaround thanks to his sister, now opening!