Sentenced to Be a Hero, Vol. 2 (light novel)

Xylo and his unit of penal heroes may have defeated the immortal demon lord Iblis and saved Mureed Fortress, but their punishment goes on. New enemies emerge - a demon lord with the ability to don a human disguise and a band of assassins bent on killing Teoritta - plunging the city of Ioff into chaos and destruction. With the addition of a dragon knight who couldn’t care less about human life and a mysterious artilleryman, Penal Hero Unit 9004 finds itself sinking ever deeper into a vortex of combat and conspiracy!