The Second Son of a Rural Baron, Ian Percus. One day, a love letter from the future arrived for him. 'If you fail to protect the future, the world will perish.' Along with a chilling warning, hastily scrawled by someone. **Original Novel:** [Novelpia](https://novelpia.com/novel/52791), [KyoboBook](https://ebook-product.kyobobook.co.kr/dig/epd/ebook/E000007232713), [KakaoPage](https://page.kakao.com/content/66562972) **Official Translations:** English

[Original Webtoon](https://comic.naver.com/webtoon/list.nhn?titleId=816842)

Gu Yangcheon commited a lot of evil while serving the Heavenly Demon. But now Heavenly Demon was dead and Yangcheon became a prisoner of ‘Celestial Sword’ Wi Seol-Ah, the heroine who vanquished his master. In his regrets, he answered her desperate questions, which resulted in his own death due to a curse meant to prevent any betrayal. But then, he suddenly found himself regressed to the time of the first meeting between him and Wi Seol-Ah. Filled with burden of his past crimes, he embarks on a new journey. **Original Novel:** [Novelpia](https://novelpia.com/novel/45208), [Onestory](https://onestory.co.kr/detail/H045836498), [Nate](https://toonnbook.nate.com/detail/H045836498), [KakaoPage](https://page.kakao.com/content/64703609)