Yuri and Murata return to The Demon Kingdom. Günter is preparing for the Maou's 16th birthday where Yuri will determine his path as an adult, Wolfram is on his way back from the Bielefelt lands. It turns out that while Yuri was away, the Ten Noble Family had chosen a new Maoh, which turns out to be Wolfram!

Yuri goes through with the ceremony and soon finds himself in The Original King's temple where he has to make the final decision. He meets The Original King himself, who tells Yuri that he will eliminate anyone who dares oppose Yuri being king.

After Yuri's decision is final, Wolfram brakes off the engagement in order to avoid any conflict and returns to the Bielefelt lands. Yuri pursues him and they have a duel. Yuri then uses his powers to defend himself and Wolfram, and to prove he is worthy of being king.

When merchants come to The Demon Kingdom's capital to sell miniature bearbees, the whole town is turned upside down. Greta convinces Yuri and Wolfram to buy her one, but the merchants give her one piece of advice: never get her bearbee soaked in water. They soon discover why.

During one of his study sessions, Yuri receives an invitation to attend Lyla and king Antoine Jean Le Pierre's wedding. However, the king announces that the special sword of his country, the one needed for them to get married, had gone missing. Yuri promises to find the lost sword.

Murata, Jozak and Conrad travel to Big Cimaron to obtain something that Murata had left behind without Yuri's knowledge. Yuri and Wolfram find out and follow them in Celi's ship.

Yuri and Wolfram attends a banquet disguised as girls. It is there where Yuri meets Saralegi for the first time. Yuri was exposed while Wolfram escaped with Adalbert's help.

Murata, Jozak and Conrad infiltrate the castle and manage to find a box full of swords. When an intruder alarm is sounded, Murata discovers it was not them that had been found. He realizes with dismay that Yuri had followed them there. They met up with Wolfram and Adalbert and return to their hideout to plan Yuri's escape. Meanwhile, Yuri was captured by the White Crows and imprisoned in a cell. Jeneus, a member of the White Crows, offers to help Yuri escape as he does not want a war between Big Cimaron and The Demon Kingdom but was turned down by Yuri who believed that Conrad would come to save him. Conrad, dressed in his old Big Cimaron military outfit pretends to come for the throne as he has a right to it, sneaks into the castle and waits for Murata's orders to save Yuri.

Lanzhil, in order to get rid of both Conrad and Yuri, orders Conrad to execute Yuri to prove his loyalty to Big Cimaron, knowing that he would not do it. Conrad cuts off the cuffs on Yuri's hands and prepares to fight as White Crow members appear and attack them with esoteric magic. Murata, Jozak and Wolfram arrive, helping Conrad who was not able to defeat the monsters created with esoteric magic. Meanwhile, Adalbert appears in front of Lanzhil, preparing to capture him. He is stopped by Yuri, who used his magic when Jeneus attacked Murata. He used up too much power and fell unconscious. Fortunately, they manage to escape successfully.

Yuri and co. visits the academy where Conrad trained to become a soldier. After Yuri gives a speech which no one really understood, Conrad challenged Günter to a duel where Conrad gives his answer to a question that Günter asked him a long time ago.

It turns out that Anissina's brother has set her up with a suitor for her to get married to.

Yuri, while visiting Caloria, was attacked by members of the White Crow but fortunately was saved by Al while Wolfram and Conrad were busy fighting. It turns out that the White Crow had been in pursuit of Al for quite a while to obtain the sword that Al had with him. Jeneus appeared while they were staying and demand that the three swords to be handed over or else Caloria would be destroyed. Yuri later discovered with dismay that the whole thing was a delusion and was determined to get the swords back.

While trying to obtain the swords, Yuri and co. were tricked and attacked by the White Crows. Fortunately, Saralegi turns up and releases them from the trap. They then pursue the Jeneus in order to get back the swords. Yuri and Al managed to get their swords back but the third sword was still missing.

Yuri, Conrad, Wolfram and Murata returns to Earth so that Yuri is able to take his final exam. Due to Anissina's latest invention, Yuri and Shori ended up switching bodies!

Greta's past is revealed.

An old invention that was created a long time ago is found.

Sara invites Yuri to Small Cimaron to make an alliance with The Great Demon Kingdom. They were attacked while having a discussion.

Yuri and Sara returns to the latter's castle where Yuri meets Sara's trusted subordinate, Gerard. It is later revealed that he had betrayed the king for Big Cimaron as he did not approve of the alliance. Sara and Yuri was separated from the rest of the group while escaping the army. After being cornered in Sara's room, he pushes Yuri out of the window to avoid being captured.

Sara is captured while Yuri manages to escape with the help of his subjects but Yuri is determined to go back and save Sara. Murata and Günter distracts the army by acting as decoys while Yuri, Wolfram, Jozak and Conrad infiltrates the castle.

Big Cimaron has crossed over to Small Cimaron to capture Yuri. They were planning to escape but Yuri decides to observe the meeting between Sara and the Big Cimaron messengers through a hidden room. This plan went wrong when Gerard, under the influence of Sara's Houryoku, attacked Sara and Yuri bursts out to protect him. Sara is then forced to hand over Yuri while Conrad promises to rescue him. However, just as Yuri and Sara is nearing Big Cimaron's army, an arrow was shot and Sara takes the blow that was meant for Yuri. Yuri was enraged and went into a rampage to destroy Big Cimaron's army.

It is revealed that Berias is the one who shot the arrow under the orders of Sara so that he can gain Yuri's trust. Meanwhile, Yuri and his group set off to return to The Great Demon Kingdom but were attacked by Big Cimaron's army. Fortunately, Gwendal arrives with reinforcements before Yuri is captured.

After Yuri went to Small Cimaron, the heads of the ten noble families summons him to a meeting around the round table to know his motives. However, the meeting is shortened when Yuri decides to play a game of "Shinoued Away" with them.

Just as Yuri and Murata are about to head for The Great Demon Kingdom, Shori surprises them as he jumps in with them and ends up pulling them further away than they planned. They were surprised to see Nicola and Hube and were shocked when they found out that Nicola and Hube had not had their wedding yet. Yuri immediately decides to plan a wedding for them. El was kidnapped during the ceremony.

Shori chases the White Crows and manages to rescue El by using magic. For them, while Yuri and group was heading back to Covenant Castle, they were once again attacked by The White Crows. Shori jumps off the carriage to attack the White Crows and prevent them from attacking Yuri. But after an exhausting fight, Shori passed out and was captured by the White Crows.

As Jeneus is about to escape with Shori through a ship, Yuri and co. arrives and attempts to stop him. Just as Yuri is about to blast the boat, he stops as he did not want to hurt Shori, allowing Jeneus to escape successfully.

Murata informs everyone that his memories of his past life has been transferred to Jeneus and that Jeneus is just a copy of the real person from the past. He then tells them that the White Crows had probably brought Shori to Big Cimaron as they were taking refuge there. They traveled there and met up with Jozak and Adalbert.

Alazon explains the history of Seisakoku to Shori while Yuri and co. takes refuge at a hideout prepared for them. Adalbert reveals that he had manage to successfully infiltrate the White Crows with the help of Velma. Meanwhile, Shori debates whether to help and made his decision with the help of Jeneus.

Shori follows Alazon and unleashes the power of the sword on Big Cimaron's army which had came to destroy the White Crows. He loses control of the sword and turns everyone into statues. Yuri, who was escaping, noticed the commotion and rushes back to save Shori. He manages to calm the sword and turned everyone back to normal. They then return to The Great Demon Kingdom. Meanwhile, Big Cimaron decides to wage war with The Great Demon Kingdom.

The Ten Nobles gathered together to have a meeting and questioned Yuri's motive to travel to Big Cimaron. They were suspicious of Shori and placed him under house arrest for associating with the enemy. After being confronted by Conrad, Shori reveals the truth to The Ten Nobles. Meanwhile, Yuri receives a letter from Sara informing him that he might be able to arrange a meeting between Yuri and the king of Big Cimaron. Conrad sneaks away on his own and is on his way to Small Cimaron.

Big Cimaron is approaching faster than everybody thought and Waltorana's troops has been mobilized. When Yuri, Murata and Shori attempt to get to Lanzhil's ship, they overshoot and arrive on Sara's ship instead. Sara uses his power on Yuri and forces him to lose control over his powers, causing him to destroy Big Cimaron's ships.

Murata and Shori stops Yuri by pushing him overboard, sending him back to Earth along with Shori while Murata is transported to The Original King's Temple. When Yuri awakens, he finds himself unable to return to the other world. Bob explains that it was probably because of Yuri's mixed emotions. Yuri is shocked to find himself all grown up after falling asleep and finds himself experiencing a normal life. He learns that Shin Makoku does not exist until he met Bob and realizes it was all an illusion. He was not afraid any more and is able to return to the other world.

When Yuri comes back, he realizes that Conrad is still in Big Cimaron and Wolfram has gone to fetch him back. On the way back, Conrad is ambushed by Berias. Conrad wins and Berias is brought back to The Great Demon Kingdom.

Yuri sends a letter to Sara, informing him on the capture of Beria and inviting him to The Great Demon Kingdom to get him back. During the night, a mysterious spell was cast and put everybody to sleep. Alazon had infiltrated the castle and intends to capture Yuri for his power. At that very moment, Berias appears and reveals himself to be Alazon's brother and Sara the son of Alazon. Alazon was shocked to see them there and fled the castle.

Berias explains the past of Seisakoku to Sara. Sara was not completely appeased by the truth and still felt furious towards Berias for keeping the truth from him. However, he got over his anger when Yuri introduced his family in the castle and showed him how much he loves his country.

Jeneus attacks The Great Demon Kingdom in order to see The Original King once again as his last wish. He sents monsters as decoys to The Great Demon Kingdom and travels over to The Original King's Temple. Upon reaching there, he meets Murata, Shori and Ulrike. Ulrike stops him by casting a barrier around him and The Original King appears, intending to destroy Jeneus with his own hands. He attacks Jeneus and both him and Murata are in pain as they remember the past. Jeneus disappears.

Yuri invites Alazon to Covenant Castle as an honored guest. He agrees to help Alazon to the exasperation of his subjects. As he is about to take the Holy Sword, Sara snatches it from Alazon, releasing its power and causing plants to erupt around the whole castle. When Yuri tries to stop him, he attacks Yuri. Yuri orders him to stop and drop the sword but Sara, in his fit of anger, vanishes along with sword with Berias grabbing him at the last minute.

Sara appears in an alleyway with the Holy Sword lying next to him. When he takes out the sword, it leaves a faint trail on the ground. Sara follows it and finds Jeneus. In vengeance, Sara gives the power of the Holy Sword to Jenus. Jeneus goes on a rampage and destroys everything in his path. However, when he attacks Sara, Alazon protects him and ended up getting hurt in the process. Sara then realizes that he had been wrong and his mother had rejected him to protect him. Meanwhile, The Great Demon Kingdom battles against Jeneus and his monsters. Yuri then joins the battle and transforms. Murata then arrives along with The Original King.

The Original King decides to disappear along with Jeneus but Yuri intervenes. After Yuri had lectured The Original King, they had let down their guard and Jeneus stabs The Original King. Yuri takes over and enters Jeneus' heart, ridding the indecision in it. Light falls from the sky, curing the injured and giving the Holy Sword power, allowing Sara to revive Alazon. Yuri reappears in front of the castle with Jeneus' soul in his hands and passes it over to Murata. Having used up too much power, Yuri loses consciousness.

Everything has turned back to normal but anxiety hangs in the air as Yuri has not awaken. Sara appears, offering to help Yuri with the Holy Sword. Yuri awakens to the delight of everybody. It seems that he had used all his power and had no more Maryoku. Sara had also made the decision to help Alazon when Yuri apologizes for being helpless. After they had left for Seisakoku, Yuri is shocked when he realizes he can not get back to Earth as The Original King had also exhausted his power. Meanwhile, The Ten Nobles gathered together at the castle after hearing the news of Yuri's missing powers. After hearing Yuri's answer they decide to continue supporting him. Later, as Wolfram was chasing him for being disloyal to him, Yuri, Murata and Shori fell into the pond and return to Earth in a bathtub where Yuri realized he still had some power