El Señor Oscuro Leonis despierta tras mil años y se encuentra en un mundo desconocido. Pero ese no es el único cambio al que se enfrenta.

La humanidad ha crecido a pasos agigantados. Si Leonis planea reconstruir sus fuerzas, primero debe hacer balance del poderío militar humano.

Los estudiantes siguen su vida cotidiana mientras Riselia perfecciona sus habilidades como vampiro. Sin embargo, todos ignoran que están viviendo la calma que precede a la tormenta.

The city is under attack, forcing everyone on the defensive.

Leonis may be a demon lord, but he still has his honor. He will put an end to the invasion, but he must first draw a sword that will test his resolve before he can wield it.

Leonis’ platoon attends a commendation ceremony on the SS Hyperion, unaware of the sinister plot to kidnap the Fourth Imperial Princess.

The kidnappers accounted for many things, but they did not account for the interference of the legendary Demon Lord.

A competition gives Riselia the opportunity to show how much she’s improved. The timing couldn’t be better: the next mission will put everyone’s skills to the test.

What quest could be so important that a hero travels to the future in order to fulfill it? Regardless of her reasons, the group must find the Void Lord before it’s too late.

The Void Lord awakens and Leonis discovers an awful truth.

Leonis must defeat the Void Lord by any means necessary, even if it means using the souls of the deceased.