Cross-Dressing Villainess Cecilia Sylvie, Vol. 6 (manga)

This world is a game…at least according to my dear sister, Cecilia, who claims she was reincarnated from another world. I, Gilbert Sylvie, didn't believe her at first, but just in case it was true, I've been doing all I can to help my sister avoid her "Bad Ends"—even facing my awful past with House Coulson. So far we've been successful, but now, thanks to Grace, Cecilia wants to trigger the "True Route"?! Can't ever let my guard down with that adorable airhead around…

Volume 6 of the Cross-Dressing Villainess Cecilia Sylvie manga series by Dangmill.