A black lily (revenge) flower dedicated to you

A world where magic and lineage are everything. Alice, born between the Duke of the Liebe family of the Ardent Kingdom and his mistress. She attends the Royal Knight Academy in place of Liam, the firstborn son of the legitimate wife and Alice's half-brother. There she meets Lina, the First Princess of the Ardent Kingdom. The two gradually become attracted to each other, and Alice, as Liam, begins dating Lina. However, it doesn't last long. Several years after graduating from knight school, Alice's parents are killed by the royal family. Furthermore, the legitimate wife Morgane dies of illness. A royal decree is issued to the now-powerless Liebe family. Marry Princess Lina. Alice marries into the royal family in place of her sickly brother and swears to take revenge alone. This is a love story, neither black nor white, between a duke's daughter full of lies and a devious princess.