The Reincarnation of a Queen

A long time ago, there was a king, who ruled his land, while ignoring the sufferings of his people. Poverty, hunger and many diseases were spread amongst his people and yet, he chose not to help them and even went as far as to start a war with another country. Many people died during that war and as a result, the remaining survivors started a revolt against that king. The king was then killed, but the kingdom was still in a bad situation.

It was then suggested that the king's only daughter be the ruler of the country, since only royal blood may ascend to the throne, despite her young age. Starting then, the little princess was forced to learn many things from a very young age. Be it martial arts, swordsmanship, etiquette, literature, ancient language, magic and other things, they were forced into her brain without minding her age.

However, as time passed by, rather then becoming an outstanding queen, she became a living weapon. Controlled by the kingdom's dark side, she began trading slaves with other countries and took over most of the land by commanding troupes to take over the smaller territories. Soon enough, she took over the whole country, but...

Most of the people she had cherished were killed during the war. She noticed too late that what she was doing wasn't right and while standing in the middle of all the corpses of her people and her cherished ones, she took her own life.

That should be the end of the story, but after killing herself, she ended up reincarnating into the time, when her father was killed and she became the rightful heir to the throne. Moreover, not only does she have the memories of her previous life as the queen, she has the memories of another life, as she lived in Japan as the secretary of the CEO of the biggest company in the world!

What will happen from now onwards?