How I Became the Villain in a Phoenix-Woman Protagonist's Story

[Western Fantasy, Sword and Sorcery + Villain Protagonist + Light-Novel-Style Reincarnation in Another World + Spicy Harem + Medicine and Farming + Academy Training + Battles Against Demon Gods]

Vain Lang, a former research nerd who transmigrated to a Western fantasy world, became the son of a grand duke of the Norton Empire. He had a top-tier lifestyle and status, but discovered that he was in the world of the novel The Proud Phoenix, cast as a villain destined for a tragic future. To change his fate, he planned to use the Emberfire Cauldron to develop medicines and avoid the death that awaited him in the original story. However, his father, America, gave him a pair of twin maids, Linor and Eileen, to serve as his personal attendants. He found the arrangement absurd and uncomfortable, and realized that the peaceful life he wanted was no longer possible.