Uesu, Tetsuto

With the power of a Demon Lord on the line, neither Basara nor the demon Zolgia can back down, and their final battle will settle the fate of both the human and demon worlds.

Basara continues the battle against demons with his stepsisters Mio and Maria, while fighting off Maria's attempts to get Basara and Mio together.

Basara and his allies face their enemies in a deadly showdown, but it is the demon Zolgia and his demon sword that is the greatest threat to them all.

When Mio is captured by the man who destroyed her family, Maria arrives at Mio's side but she might not be there to help Mio. While there, Maria is forced to come to terms with her past. Meanwhile, Basara tries to get Mio's location out of Lars but he won't tell where she is without a fight.

Maria decides to visit Basara during his class, and take a look at the school grounds. Then the curse on Mio is activated in the girls locker room and she and Basara are forced to bring their bond to the next level in the showers. Meanwhile, danger is on the horizon and a deadly battle will soon begin.

Mio begins her fight against the heroes who have arrived to kill her. Basara has a plan, and he vows to fight for Mio, provoking an epic battle of powers that could be deadly.

After saving Mio from the White-Masked Demon, Basara now has to fight an even greater enemy. When it seems that Basara and his sisters have met their match, someone from Basara's childhood arrives and he is from the mysterious hidden village of heroes. Then Mio and Basara take their relationship to the next level to make Mio stronger.

When the enemy tries to take the Demon Lord's power in Mio's body, Basara comes to his little sister's rescue; but in the process, a moment in Basara's past comes to light showing his mysterious power, the Banishing Shift.

High school student Basara Toujou's father remarries and he gains two little stepsisters. However, when his father leaves on a business trip, Basara learns his sister Mio is heir to the Demon Lord, and the other sister Maria is Mio's succubus attendant. Basara offers to help the sisters escape demons, but when he enters into a magical bond with Mio to be her servant, something goes wrong and he becomes her master instead. Now he must force her body to submit to him to break her curse.