Oshi (Uso) no Hittou Majutsushi-sama ga "Oretachi, Ryou Omoi Dattan da ne" to Dekiai Shitekurun desu ga!?

Elna, the youngest daughter of a financially struggling baron, has spent her entire life driven by a single goal: marrying into wealth to cover her younger brother’s mounting medical expenses. Desperate to secure her family's future without drawing unwanted attention to herself, she carefully blends into the social landscape of high society. She joins the booming "fan club" culture popular among the nobility, feigning enthusiastic devotion for a young man named Slenn to maintain a perfectly unremarkable facade. However, her meticulously crafted plan unravels when Slenn suddenly proposes to her. To make matters far more complicated, it quickly becomes apparent that he is not simply swept up in the romance of the moment. Slenn reveals that he has known all along that Elna’s affections were nothing more than an act. Rather than being offended by her deception, his unexpected proposal and knowing demeanor suggest that her charade has only drawn him closer, leaving Elna completely unprepared for the genuine devotion now directed her way.