Yarinaoshi Reijou wa Ryuutei Heika wo Kouryaku-chuu

The curtains rise on the tale of a young lady who once stormed the battlefields now getting to start her life all over again! The young noblewoman, Jill, was sentenced to death by her fiancé, the Crown Prince. Just as she was on the brink of death, time rewinds back to when she was 10 years old, to the party where her engagement had been decided! Determined to avoid going down the same path to ruin, Jill hastily proposes to the person behind her, only to discover that he’s none other than Hades, the Emperor of the neighboring kingdom who’s (set to) fall into darkness, ergo the worst villain.