This is a story that takes place after the happy ending. High school student, Amakusa Isamu, who transferred to the fantasy world of Bluewers, saved the world as a great magician with his companions. For the female holy knight Waltrude, who was ennobled for his achievements, Isamu now takes on the task of land management. However, the problems are piled up: a city turned into ruins, a dwarf village that no longer produces iron, a maritime city that does not pay taxes, and villages troubled by monsters. As the strongest adventurer in Bluewers, Isamu, along with his companions, tackles these problems with magic, modern knowledge, and mostly with cheat-level financial power! Until the day he returns to Earth, one year later.