Immortal Sign in Sword System

In those 3 days I was passed out I started to sought my memories remembering the sleepless night's, being work to the bone and my Bosses that abused there power by firing people so that their friends could get a job I eventually got fired for the same reason.Then I realized that I had been transmigrated into a 13 year old boys body named Naga Mizu that was supposed to be the future clan leader for the Mizu family but was ultimately abandoned by his father because he had the worst of the worst meridians in the world I sighed in defeat. Out of the blue I hear a graceful yet emotionless female robotic voice "Hello master I am the Immortal Sword sign in I will accompany you on your journey to nirvana" "nirvana!!" I exclaimed in shock but before I could understand I woke up and the lady that was by my side apologized saying "sorry my son I have failed as a mother and your protector and I wish you the best in your endeavour"