The World's Domineering Swordsmanship

"Classmate, if you don't practice swordsmanship, you will die." In 2050 AD, a high-level civilization called the Kingdom of Swords came, and the earth became a source of troops for the Kingdom of Swords. From then on, everyone must log in to the 'Sword Domain' after graduating from high school, participate in six months of military training, and then step into the bizarre cosmic battlefield... This era is both glorious and cruel. Only the strong can avoid being dictated by fate. (PS: This is an attempt to combine science fiction with kendo. I hope everyone will support it.)