Lady Felicia, the eldest daughter of the Marquisate of Airheart, became engaged to Silas, the eldest son of the Marquisate of Hamer, and was spending her days happily, praised by those around them as a well-matched couple.

The only problem was that her cousin, Maisie, would tag along on their dates. Maisie was Felicia's cousin, and she claimed to be bullied due to her shy personality. Silas accepted Maisie, who said that she only felt happy when she was with the two of them, without a single complaint.

At first, Felicia was grateful to Silas, but before she knew it, Maisie had grown closer to Silas...

Maisie had a habit of stealing. What she stole was not objects, but other people's works and information.

Silas also had a slight problem, and when it came to light at one point, Felicia's feelings instantly cooled.

They could get along fine without her. She withdrew herself with a sudden cold shoulder.

Silas rushed to try and reconcile, but it was too late. Felicia continued to give him the cold shoulder.

Then, Second Prince Kevin, who heard the rumors, started aggressively approaching Felicia...

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※Also available on Alphapolis, Pixiv, and Kakuyomu.

※Title changed from 'My Fiance Seems to Prefer My Kleptomaniac Cousin. I'm Stepping Aside with a Cold Shoulder, So Do Whatever You Want.' (April 29, 2022).

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It has been adapted into a wonderful manga with art by Orochi Yatsumata-sensei! Currently serialized on Comic Breeze. Please check it out!