A few days later, Ard, Ireina and Jinny join the war as medics under Verda's support unit, and stand on a hill while the main force prepares to battle the demons ruling the Aralia Plains. Although Ireina and Jinny are nervous, Ard reassures them that they have nothing to fear, explaining that the magic equipment enchanted into their outfits will protect them. As the main force charges into battle, Ard relaxes with the support unit, recalling that the battle against the demons of the Aralia Plains was not a difficult one, and that they won it without much trouble.
Just as he expects, the main unit of Varvatos's army keeps defeating the enemy without any difficulty. The enemy commander, however, comes up with a clever strategy and launches an attack on the rear unit, targeting the medics and the support forces. After he uses magic to overwhelm Varvatos's army, Jinny and Ireina become frightened. Ard, on the other hand, calmly steps forward, realizing that this situation could actually work in his favor: if he defeats the enemy commander, he might earn enough recognition to secure a meeting with Varvatos.
As the enemy continues advancing, Lydia receives news that the rear unit has come under attack, and is shocked. She rushes over to provide support, only to find that Ard has already defeated the enemy commander, along with the rest of the enemy troops, using a single magic attack. When Lydia arrives and sees the fallen commander, she is deeply impressed, and finally arranges a meeting between Ard and Varvatos.
Delighted by the news, Ard heads for Demon Lord Varvatos's castle with the others once the battle has come to an end. After entering the castle, Jinny and Ireina are astonished by its size. While the two of them keep praising the beauty and the scale of the place, Ard secretly feels proud, since it used to be his own castle in his past life.
As they approach Varvatos's main hall, Jinny and Ireina become nervous, and Ard reminds himself that he needs to act carefully, considering that he has defeated an enemy commander even though he is supposed to appear as nothing more than a commoner. Just then a strange fireball spell is launched toward Ard and his friends. Ard blocks the attack easily, only to realize that Alvaro was merely testing them.
Lydia becomes furious, and the two of them immediately start arguing, until it turns into a fight. They are soon stopped by the demon lord, who arrives at the scene and scolds Alvaro for causing unnecessary trouble. After ordering Alvaro to leave, the demon lord turns his attention to Jinny and Ireina, who are left speechless by his overwhelming aura and his majestic presence.
He then invites everyone into the main hall, where Jinny and Ireina keep praising Varvatos's appearance and repeatedly calling him the demon lord. Hearing that, Varvatos looks confused, and says that there is another demon lord, and wonders why the two of them keep calling him one instead. That completely shocks Ard.
After the meeting ends, he discusses the matter with Jinny and Ireina in Verda's laboratory, wondering who the second demon lord could possibly be. Overhearing their conversation, Verda explains that the demon lord in their own world might be a different one from the demon lord of the timeline they are currently in. Ard carefully considers her explanation and realizes that she could be right. He concludes that the self-proclaimed god was most likely referring to the current demon lord of this world as the threat they need to eliminate.
After reaching the conclusion that defeating this world's demon lord might allow them to return home, Ireina suggests asking Varvatos for help. Verda disagrees, explaining that Varvatos would never act without a good reason. She also reveals that the other demon lord appeared suddenly three years ago, and that he possesses incredible strength. Hearing that, Jinny suggests telling Lord Varvatos the entire truth, believing that he might be willing to help once he learns about the other demon lord. Ard rejects the idea, saying that they first need to earn more of Varvatos's trust before asking for such a favor.
At that moment Lydia enters the room and invites Ard to accompany her on a mission, without revealing that their opponent is Milveis, the Curse King. Without a second thought Ard immediately agrees, knowing that he needs to achieve more if he hopes to gain Varvatos's trust and ask for his help.
This time Ard heads out alone, leaving Jinny and Ireina behind. During the journey Lydia finally reveals the name of their target, which instantly shocks Ard, because he remembers exactly who Milveis is. Seeing the fear on Ard's face, Silfie reassures him that it is only natural to be frightened, since Milveis is an arch demon, one of the highest-ranked and strongest demons in existence.
Ard, however, is not afraid because of Milveis's rank. What truly troubles him is the memory tied to that name. In his past life, Milveis was the one who cursed Lydia, and that curse left Ard with no choice but to kill her himself.
Before long they arrive at Milveis's castle, where Ard wipes out the first wave of the enemy army with ease. Lydia is impressed by his strength, but Ard stays completely focused, realizing that he cannot afford to repeat the same mistake twice and that he must take this battle seriously.
As the three of them continue toward the castle, it suddenly bursts into flames out of nowhere, which leaves Ard, Lydia and Silfie completely confused. They rush inside to find the cause of the fire, only to be stunned when Milveis's severed head flies through the air after he has been beheaded.
Moments later, a man calmly walks out of the same room and introduces himself as the demon lord. He boldly declares that he will claim every land he sets his eyes on, which is an indirect declaration of war against Varvatos and his entire army. Before Lydia or Ard can even respond, the demon lord turns invisible and disappears from the castle.
After the army returns home, Varvatos calls a meeting, which Ireina and Jinny also attend. Although some of the officials object to their presence, Varvatos explains that they are Lydia's guests and have already done a great deal for the country. He then announces his plan to wage war against the demon lord and defeat him in a single day. To make that happen, he intends to go all out and deploy all four heavenly kings alongside himself on the same battlefield.