Why Raeliana Ended Up at the Duke's Mansion, Vol. 4

Raeliana has been summoned by Noah's half-brother, King Siathrich...But is it an invitation to tea, or an invitation to captivity?! Siathrich, knowing her and Noah's engagement is fake, makes Raeliana an unexpected offer...And with the end of her betrothal in sight, will Raeliana have to enter into a marriage of convenience with someone else...?!