Heir of the Black Dragon, The Secret of the Black Dragon (set of 2 books)

Set of 2 books from the "Unwanted Bride" series by Anna Jane.
 

"Heir of the Black Dragon"
They say that on a festive night, any wishes come true if you ask the spirits correctly! I asked for true love... Beware of your wishes, for there is only one step from love to hate. On the Night of Winter's Fulfillment, I became the bride of the heir to the Eternal Empire's prince. We study at the same academy of magic and hate each other, yet are bound by a marital vow that cannot be broken. Shall we play the loving couple or try to find a way to break the vow? The wedding day is drawing closer. And the feelings... are stronger. "Heir of the Black Dragon" is a story of love that ignited like flame from a spark.

"The Secret of the Black Dragon"
I was named the bride of the heir prince whom I hated. I tried to break the marital vow, but didn't notice when I fell in love. I was called a dragon, the last of the line of the Black Dragon. I dreamed of happiness but gained power. How to accept that love is darkness, from which the stars shine even brighter?