Code Geass: Hangyaku no Lelouch

Synopsis

Having reason to suspect the death of Marianne vi Britannia, his mother, was planned by one of his relatives, Lelouch questions Clovis about her murder before killing him. He returns to Ashford Academy and realizes his classmate, Kallen Stadtfeld, is part of the terrorist group. Using Geass, he learns about her motivations for joining the terrorist group and discovers Geass only works once per person. Kallen suspects Lelouch's involvement in the previous battle, but is fooled when Lelouch prepares a pre-recorded phone call. Soon after, the news announces Suzaku is convicted for Clovis' murder and is to be trialed. (Source: Wikipedia)