Once an indispensable member of the Hero's party, a 27-year-old specializing in Training skills finds himself sidelined as the group's power grows. Initially pivotal to the team, he is ultimately let go by the hero. Despite this, due to his significant contributions, he is granted a small fiefdom instead of a typical retirement package. As he transitions from the frontline of adventures to overseeing his new domain, populated by 2500 residents across seven villages, a new idea dawns on him. Contemplating whether training his people could empower his territory sufficiently to challenge even the demon lord, he embarks on a journey of transformation and strategic planning.