After losing his grandfather, 19-year-old Kazuya Souma, a young man with dreams of becoming a civil servant, finds himself alone in the world. Suddenly whisked away to the struggling Elfrieden Kingdom in another realm, he is tasked with a special mission as a 'hero' to aid in the ongoing war against demons. Unwilling to be a mere pawn, Kazuya chooses a different path—to rejuvenate the kingdom's economy through administrative reforms instead of traditional heroics. Crowned as the new King of Elfrieden and engaged to the princess, Kazuya, known as the 'Realist Hero,' embarks on a quest to gather skilled individuals who will join him in his bureaucratic endeavors to restore the kingdom's prosperity.