Cross-Dressing Villainess Cecilia Sylvie, Vol. 5 (manga)

Although Cecilia and the boys rescued the heroine, the next death flag is fast approaching. After returning to Vleugel Academy, Cecilia must conquer the Mordred route¿a difficult feat while dressing as a boy. Plus, the mystery of Killer¿s identity and hiding her own from her dearest fiance, Prince Oscar remain top priority...