The Devil Is a Part-Timer! High School!, Vol. 4 - manga (The Devil Is a Part-Timer! High School!, 4);

The Devil King and the Hero clash in an epic battle--in high school? Maou and Emi's latest feud centers on the race for student council president. The day of the election has arrived, but what will happen when the truth of Chiho's long-held crush on Maou comes to light? If only high school were as easy as a demonic reign of terror!