The Testament of Sister New Devil Departures.After Basara saved the demon realm, elders from the hero village hear about these events and agree that Basara has become a potentially dangerous foe. Before leaving for his home world, Basara confirms that Ramsus is actually the previous demon king Wilbert in disguise and has been secretly watching over Mio, though he shadily denies it. Once they arrive home, they see an advertisement about the opening of a new indoor water park and decide to go in order to deepen their bonds and get stronger. While there, Basara and Mio run into Chisato, who tells Basara of an upcoming meeting with her. Seeing Basara and Chisato close with one another, Mio's servant curse activates, forcing Basara to ease it behind a waterfall. On their way home, the group is sent a message from the hero village demanding Basara, Mio, Yuki, and Kurumi return there. Conflicted, Mio, Maria, and Zest attempt to cheer up the group by making food, while Yuki and Kurumi go over battle training. Basara meets with Chisato at a hot spring inn, where he tells her he believes he has to fight his battles alone to save others. After he falls asleep, Chisato appears to transfer some of her godly powers into him and says that she will always fight beside him. The next day, Basara encounters Lars, who after instigating a fight with Basara, creates the illusion of an evil Basara for him to overcome. Realizing the girls are the source of his true strength, Basara defeats his copycat and parts ways with Lars. He arrives home to see each of the girls dressed in wedding dresses, claiming that he is selfish for fighting alone and that they will fight beside him, causing their servant curses to activate. Basara appeases each of them, deepening their bonds and strengthening their resolve. The next morning, they pack their belongings and head out for the hero village.