A Daily Magic Holiday

As soon as I returned home during the summer vacation, my brother tricked me into going to the battlefield, and then I was beaten with a sap and made a prisoner! She escaped from death and went to be a guest with the Wuton sisters, her classmates from the Odin Empire in the north, but because of her hidden bloodline, she was forced to stay and marry the future queen! How can a minor get married? How can you get married without true love! ... What should we do about this?