In the web novel 'The Regressed Villainess Tore Up the Annulment Papers,' the protagonist explores the concept of regression through a villainess who holds a deep appreciation for the idea of regret leading to change. Set in a fantasy world, the story delves into themes of love, harem, and romance. With tags like 'Second Chance' and 'Obsessive Love,' the novel follows a male protagonist in an academy setting, offering a unique blend of fantasy and romance.