The students go about their daily lives while Riselia hones her skills as a vampire. However, they are all unaware they are experiencing the calm before the storm.

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.

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.