The Substitute Bride: Marrying the Man I Love in My Sister's Place

Story :  "Today, I get to marry the man I love... but he doesn't love me." Lilia, a princess from the Ehre Kigndom, has admired Prince Oscar of the Glanz Kingdom for the longest time. However, it was decided early on that older sister, Isabella, would be the one to marry him due to her beauty and pride. Lilia had given up on the dream, but one day Isabella suddenly called off her betrothment. As someone of the Ehre royal family must marry into the Glanz Kingdom for continued peace, Lilia is now set to take the place of her older sister. Lilia is full of joy and concern all the same, but it feels as though this marriage sits in a shadow cast by Isabella, now looming over them. Prince Oscar seems to be distant, unconcerned with things, and Lilia is now buried in preparations as the crown princess. What will happen in this new and complicated relationship?