I Held a Long Sword in My Hand That Day, and There Was No Way Out from Now On

(Superpower + fast pace + no system + late invincibility + no heroine + no sword) I am Lin Chen, an ordinary person. My life is filled with dull and boring life. I live mechanically day after day and have no hope for the future. But with an old man above me and a little dog below me, I can only live in this world where I can't see the way forward. I will fantasize about becoming a swordsman and roaming the world.... Until that day, I held the sword and had no choice but to retreat