1. Lady Clarise is evil and is the one behind the kidnapping of Teresse. She tries to persuade Teresse to give up on the Grand Duke in exchange for 200,000 peir, but Teresse refuses and tackles her. The guards then burst in and arrest everyone.
2. The Grand Duke reveals that Rina is the woman from 7 years ago and that he's been in love with her all along. He makes her touch the ring, which causes flowers to bloom everywhere.
3. He then reveals that he was never looking for a consort. From the start he was planning to marry Rina. The pageant was actually an excuse for him to gather noble ladies together and weed out anyone who would be a threat to his wife in future, especially since she is a commoner and is likely to be bullied. It was also an excuse for him to arrest and depose corrupt noble families like Clarise's.
4. To give Rina a noble status, he asks Terese's family to adopt Rina as one of their own. I stopped reading there, but I presume they agreed.
5. Because I stopped reading, I don't know what happened after that, but I'm sure Teresse and Jade ended up together.