@creek that might be one of the reason but i think the main reason was she really thought he became a demonic human with his own will and betrayed humanity until she found out that he's manipulated by his sister (heavenly demon) and has a cursed put in his heart when he died by confessing the locations of the remaining demonic human causing his heart to burst. You can check it in the first chapter, he even said in his monologue before dying that if he told them that all that he has done was against his will and manipulated from the very beginning, would they forgive him? By the time Seol-Ah learned the truth she felt guilty and regretted she didn't notice it from the beginning that's why she did everything to turn back time. Novel readers said that Soel-Ah and the heavenly demon worked together to bring him back to the past idk if it's true.
I don't care about your taste!
