The man, once known as the world's strongest agent, became an educator dedicated to raising the next generation after his retirement.

After raising his disciples and passing his sixtieth year, he lost his life during a mission orchestrated by a high-level conspiracy. However, he reincarnated into another world, retaining all his memories.

Though astonished by the diverse races and magic, he quickly adapted with his innate resourcefulness, turning every new experience into his own strength.

Mastering unique magic and undergoing rigorous training, he achieved an unrivaled level of strength. Yet, he resolves to once again pursue the path of an educator, a role he felt he left unfinished in his previous life.

This is the story of an educator who, utilizing the memories and experiences of his past life, embarks on a journey across the world with his disciples.