A false bride? (1)

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

The Great Chinese Historical Romance of a Young Girl Fighting Through a Troubled World! Time is shaken by the death of the King -- there was no Prince with the certificate of the successor, 「 Tei-no-rei 」, and the race for the successor became intense. The young girl who holds the key of 「 Tei-no-rei 」 at the request of the third Prince, Kagamibuchi, becomes a substitute for a noble bride to escape the pursuers --?