Now we're coming to the question why did she agreed so quickly. It's very obvious if you knew there circumstances in the past. Jaria's father was very rich and friends with the king of Justoxa. In the past Jaria was often bullied, because her father was an "Up sucker". The only ones, who treated her nicely were Prince Harie and the daughter of an important childe "Lera". But Lera died on an incurable fever. So the only one she had known long is Harie. When they were eight they both separated, because of their Studiums. -From the age of five to eight you have to go to the elementary school. From age of eight you have to choose your Studium.- 6 years after they separated Jaria's father was drugged and became addicted. He sold her just to get more drugs.
So the reason why Jaria agreed is because Harie is one of the only lights in her life.