Y/n has lived in the countryside all their life and is finally moving to the big city to persuade their dreams in becoming the best of the best in Iaido (a Japanese marital art). Once transferring to Hyosan High school they suddenly meets face to face with their childhood friend Yoon Gwi Nam who wants nothing to do with them. During this process a sudden zombie apocalypse happens and Y/n has no choice but to use their Iaido skills and search for Gwi Nam