Cross-Dressing Villainess Cecilia Sylvie, Vol. 3 (light novel) - Dangmill, Hiroro Akizakura

Still disguised as her male alter ego, Cecil, reincarnated villainess Cecilia Sylvie discovers that the only surefire method of averting her death is raising all the heroes’ affections enough to enter the True Love Route. But Eins and Zwei, twins whose scenarios she never completed in her past life, are proving an uphill battle. As if that weren’t bad enough, the siblings seem to be hiding something... Meanwhile, escalating advances from Oscar and Gilbert have Cecilia’s heart racing! Will she be able to uncover the twins’ secret while hiding her own? Her life depends on it!