After Taking Off My Armor, I Became the Supporter of the Subjugated Princess.

Xiao Bei has been guarding the demon frontier for three hundred years, from black hair to white hair, from an unknown person to a natural moat where "the demons all detour when they see them". He was a mortal, but with a rusty sword and scars all over his body, he blocked the demons from going south countless times - the court forgot about him, the people did not know him, he only remembered the word "guarding the border". When the three hundred years were over, he took off his armor and returned to his fields. He wanted to spend the rest of his life in a small town in the south of the Yangtze River, but he bumped into a girl who was covered in injuries. "Senior, I am Ji Yueyao, the princess of the former dynasty." The girl knelt on the ground, holding half of the broken jade seal in her hand. "The demon is back, and the court is decaying without a fight. Please come out, save the world, and save my country!" Xiao Bei looked at the light in her eyes and remembered the war on the border three hundred years ago. He touched the scabbard on his waist that had long been without a sword, and said calmly: "Want to restore the country? First learn from me how to 'kill demons'." No one knew that this seemingly ordinary old man had single-handedly slaughtered one hundred thousand demon vanguards; no one knew that when he took off his armor, the demons on the border collectively knelt down to him and begged him not to leave. Now, the decadent court wants him dead, and the evil demons want him dead, but Xiao Bei only cares about one thing - Protect Ji Yueyao, guard the world, and let those who have forgotten him see the power of the "Frontier Cairn" again!