The Prince's Cursed Assassin

To avenge her family's massacre, Meilin, an assassin, identifies Jasper Moreau as the enemy and infiltrates the court to assassinate him. She accidentally becomes bound to him by the 'Twin-Souls Curse'. Meilin discovers the true culprit is The Crown Prince. They form an alliance for revenge, and feelings grow. But she is schemed against by Jasper Moreau's fiancée, Melora March, and learns she is merely a pawn in his game.