It was close to the date that the prince of your region should be crowned as king, to become a king, there is one condition, he have to get married.

Lately you have received letter without the name of the person who wrote the letter, you read all the posters and they were all about love... Do you wonder who would like you? You are a simple commoner

(The Prince is sending you a letter, thinking your address didn't exist. He's doing this to gain the throne)