After her 12th birthday, Princess Margot left the mansion she had grown up in and returned to her original residence, Castle Avalon.

It was her father, whom she met for the first time, who welcomed her to the imperial capital. One day, at an evening party, the princess met a young nobleman while she was inevitably involved in a ugly battle between nobles over her imperial throne.

Rodis, the only son of the Duke of Castagnier, was one of her relatives and a kind young man──

[Translated from official website]