Code Geass: Lelouch of the Rebellion: 1x3

The False Classmate

Lelouch confronts Clovis about the murder of his mother, Marianne vi Britannia, before killing him. When he returns to Ashford Academy, he discovers that Kallen Kōzuki, one of the terrorists he helped in Shinjuku, attends the same school. The limitations to his newfound power are also revealed to him when he attempts to question her then erase her memory, so he creates a cunning deception to ease her suspicions of his identity. When the death of Prince Clovis is announced in the media, it is Suzaku Kururugi who is accused of the murder.