[Serialized Manga] My Fiancée Was Borrowed and Not Returned, But I Don't Really Need Her Back Anymore

Countess's daughter Escar is asked by her friend Mina to lend her fiancé Ronald as an escort for a party, saying "My fiancé is always busy with work and I have no one to escort me to the party. If things continue like this, I'll be embarrassed, so please lend me your fiancé Ronald for just one day." Though reluctant, Escar agrees because Ronald is eager to go. Escar's concerns prove justified as Mina and Ronald rapidly grow closer. On the night of Escar's birthday, she crashes the party that Ronald and Mina are attending, having abandoned her birthday celebration. There, she encounters the next Duke's son, who is Mina's fiancé, and... This is a story that matches the title exactly. Revised on 2/29.