Demon Queen Reincarnation in an Archmage Webnovel

I never asked to be reincarnated, and certainly not as the final boss of the sequel to my favorite Archmage webnovel. What was my name? It didn't matter anymore. I used to be a nobody; just some college student with no friends, no goals, and no life. I was drifting along, minding my own business, enjoying my favorite webnovel when Truck-kun sent me. Literally. And reincarnated me into the very story I’d been following since its debut. At least I got to finish reading the sequel and know exactly how the story ends. After killing the Demon King, our hero was celebrated by his kingdom and took a long, well-earned rest where he accidentally cultivated his power to the maximum over a few thousand years by exterminating level one slimes on his peaceful farm. But he didn’t eradicate the demon race, and the Demon Queen bided her time. While strengthening her forces, she created the strongest tower, kidnapped the kingdom’s princess, and awaited for the hero so that the Demon Queen could take vengeance for her dearly departed. Of course, the Archmage ended up auramaxxing, powering up, and finally defeating the final boss. I was thrilled with the story’s ending; with no regrets, I was ready to rest in peace and pieces. Except I woke up as Saeruelianne Ashvondelias, the Demon Queen. Now that I'm here with a tower to run and the demon race under my command, I’ve changed my mind. I’d prefer not to die, thank you very much. But the sequel was here, and the Archmage is coming to finish what he started. Saeruelianne Ashvondelias, what have you done?!