Leo, a penny-pinching boy with a strong fondness for money, experiences an unexpected turn of events when he finds himself inhabiting the body of the beautiful and displaced young lady, Leona. Formerly a marchioness ostracized from high society due to false accusations, Leona shunned the prestigious academy populated by nobles. Opting to use magic to evade attendance, Leo, enticed by a generous offer, decides to take Leona's place at the academy. Despite being someone who would typically be swiftly expelled from such circles, Leo, now possessing unparalleled beauty and unique principles, is mistakenly perceived as a 'Pure Maiden' by those around him. The Marquis couple, an imperial princess, and even the first imperial prince find themselves captivated by this intriguing facade. Thus unfolds the tale of Leonora Von Halkenberg, known as the 'Altruistic Saintess.'