It could be that there was a hidden agenda or a mysterious force at play. The story could have built up to this point through a complex web of relationships and plot developments.
Raeliana wound up at the Duke's Mansion in the manga because of a confluence of events. Maybe a chance encounter, a secret deal, or an unforeseen turn of fate brought her to that place.
Maybe it was a combination of fate, chance encounters, and hidden motives. There might have been some mysterious forces at play that pushed her towards the Duke's mansion.
Well, it could be due to a series of unexpected events and circumstances. Maybe she was mistakenly directed there or had some sort of obligation that led her to the Duke's Mansion.