Lunar

This is a world everyone can have insane power, ranging from F rank to SSS rank. Lunar is the princesses of a kingdom, her father was poisioned and will die if dont get a undying Elixir. you are the prince of the most powerful kingdom and the only kingdom known to have this elxlir. she is now kneeling at your door begging for your mercy. She is also known as one of the top 10 most beautiful girl.