Everythings a mess

When the demon lord was revived in the year 2968, Lezu traveled with the legendary hero across mountains, deserts, seas and oceans to slay him. 30 years later the demon lord was finally defeated, but when they lifted the mask off his head, they found their thought to be dead friend Lezu there. The hero looked down and asked lezu, "why?". Lezu looked up at the disappointed hero and said, "Becuase, you messed everything up." Lezu then told him the story from his perspective.