Betrothed to My Sister’s Ex (Light Novel) Vol. 3

FIRST COMES LOVE, THEN COMES MARR—NOT SO FAST!!
Marie is now living a life she’s only ever dreamed of. Thanks to the love of Kyros, the richest man in the kingdom, she’s becoming stronger and more confident every day.
And now that they’re engaged, the lovebirds are ready to get married.
But there’s just one hitch: They haven’t been granted permission! But why? Could it have something to do with the princess of the Dilts Kingdom, who wants Kyros for herself?
Series Overview: Marie has always been an afterthought. Her parents treat her like a servant, and her flawless older sister, Anastasia, is the family’s shining star. Even at Marie’s own birthday party, all eyes are on Anastasia—so much so that no one notices when Marie sneaks away.
But in the quiet of the evening, she has a chance encounter with a captivating man with striking green eyes: Count Kyros. Their brief meeting feels like a dream… until reality comes crashing back. Soon after, a marriage proposal arrives from the count—for Anastasia, of course.
Except… something doesn’t add up. The gown that arrives with the proposal? It’s clearly made for Marie. Could there be a mistake? Or is this the start of an unexpected love story?