In the intriguing web novel 'I Regressed and Ended Up with a Demon & Harem,' readers are taken on a thrilling journey where the protagonist, after defeating the Demon King and traveling back in time, finds themselves surrounded by demons transformed into alluring young women. As the protagonist navigates this unexpected situation, questions arise about the true nature of happiness and the significance of appearances. With a mix of action, adventure, comedy, drama, fantasy, harem, and slice of life elements, this Korean web novel offers a unique and captivating reading experience, perfect for fans of fantasy and second chance stories.