*Notes: \- Chapters 2 to 11 were split into multiple parts in the original serialization and later combined in the volume releases. \- Includes one extra chapter.*

Year 20xx, a time when the "Death Game" has become important. A large number of people participate in them in search of great prizes. FATHER, the greatest administrator of Death Game, is the place where Kurosaki Eiji works as general manager of that division. This manga follows the life in the working world of Kurosaki Eiji and the problems he must endure in his job while hiding his work from his family.

Soma, who reincarnated with the memory of the previous life, was awakened to the rare ability "trial and error" that can confirm the skill level numerically, and thanks to that, he was able to raise various levels evenly. At the entrance ceremony at the knight training school that he admired, the student's skill level and skill level are judged and classified, and the top class is certain if the total skill level reaches "200". However, the total level of Soma at this time was "1012", which should have been far above the margin , but the judgment machine could not measure the 4-digit level! As a result, it gave the wrong estimation and Soma has to enter the problem child class. With the skill of "trial and error", Soma causes a big revolution in the aristocratic school! (Source: Futabasha, translated)