Ghost Slayer: The Great Swordsman System at the beginning, our teacher follows the country

As the champion of the World Swordsmanship Competition, Si Shu traveled to the world of Demon Slayer in the Warring States Period, awakened the Great Swordsman System, and became the disciple of Ji Guo Brothers.
Since then, he has created various legends of his own in this world!
Gui Wu Tsuji Wu Mi: Facing Yuan Yi, I can still run away, but facing Secretary, I have only one dead end!
Ji Guo Yuan Yi: Your strength has surpassed mine!Ghost Killing Squad: Secretary Secretary is the most powerful man!