Regression. An imagination that everyone has at least once in their lives. A story about going back to the past, correcting wrong choices, changing bad endings into happy endings, and using information from the future to grab wealth and fame. There was a time when I, too, dreamed of returning. When times were so difficult that I thought it would be better to die, I often imagined that. But I don’t imagine that now. I am 40 this year. I survived all the hardships. When I was 18, my world turned upside down when Earth and other dimensions were connected. At the age of 20, he awakened as a superhuman and began fighting against monsters of different races. Hunting mission battle war. There were many times when I almost died or became an idiot. Honestly, I had no talent. In a movie, its role is to fill in the number of characters in a war scene. Extras who do not affect the flow of the play. To survive, I had to persevere tenaciously. I had to become selfish, cowardly, and cruel. To make up for his lack of talent, he trained to the death and even worked as a miser to save money. In the end, I survived. I paid off all the debt I owed when I was young and built several buildings on the Yolk land. The 150 pyeong mansion, which began construction three years ago, has also been completed. I am confident that this is a fairly successful life. Now I was thinking of retiring and resting comfortably. Because I was guaranteed a perfect retirement. But… “…this isn’t it.” I muttered absentmindedly, but the reality before my eyes did not change. Musty smell. A room without windows. A narrow bed that can barely accommodate one person. This is the gosiwon where I lived 20 years ago. “…This isn’t real, is it?” No matter how many times I close and open my eyes, the background is the same. Even if I pinch my forearm, it still hurts badly. Why? How? No, more than that, anger begins to rise from deep within my heart. “Sir…” Regressing means that everything I worked hard to achieve over the past 20 years has disappeared. I jumped up from my seat and shouted. “Holy shit!! If you’re going to do it, do it quickly!” I regressed. There was nothing worse in the world than this.