Ameri carefully plans out her date with Iruma by going through guidebooks and her favorite manga, "First Love Memories." They are finally going on their date that she'd been dreaming of! They end up going to Aqua Case, an aquarium that is also a waterpark! Ameri tries to make various exciting things happen on the date with her secret plan, but everything she tries doesn't seem to be backfiring, and...

The students of the Misfit Class have been given a special order. The order was for all of them to reach the Dalet rank before they become second-years, or they would lose the Royal One that they had worked so hard to obtain. The next event where they can raise their rank is the Harvest Festival. In order to help them raise their ranks in such a short amount of time, the school had prepared special tutors for them. The new term had only just begun, but unexpected trials await Iruma and his friends.

Bachiko finally starts training Iruma, on one condition. Bachiko is known to be one of the best archers in the underworld and she tells Iruma he'll have to make a bow of his own. Iruma transfers some mana into one of the feathers of the guardian of Cutthroat Valley that he finds at the Magical Apparatus Battler and creates a bow. But Bachiko tells him it's not good enough. Bachiko tells him that the most important thing is to visualize the bow that he wants the most, but...

The final battle for the Babyls first-years, the Harvest Festival, finally begins. It is a rank-advancement exam in the form of a survival game that takes place over four days. They must hunt the various magical beasts and plants that exist in the jungle for points, and the one who comes out with the most points wins. The Misfit Class just finished some rigorous training, and they end up back in the groups they ended up training with, butting heads with everyone else. Onward to the jungle filled with dangerous magical beasts!

Iruma is trying to get back to the surface after exploring the underground labyrinth with Naphura. On their way up, he runs into his parents that shouldn't be in the netherworld. They're actually an illusion created by Orobas's magic. Iruma is overwhelmed by the illusion and falls off a cliff. Down below, Iruma continues to see nightmarish illusions. Will he be able to overcome his fears?!

The third day of the Harvest Festival. The announcement of how many points each has is announced through the jungle. Kalego mentions that a certain student still has zero points and tells them to shape up. After hearing this, Asmodeus and Clara immediately think of Iruma. Meanwhile, down in the underground labyrinth, Iruma figures out a way to get out...

The battle between Keroli's Magical Beast Kingdom and Picero and Goemon's squad continues. Elizabetta also joins the Magical Beast Kingdom and charms the enemy male students on the frontline. Meanwhile, Iruma and Lead also arrive at the Magical Beast Kingdom. After having Camui interpret what Naphula was saying, they find out that it was Orobas who had been attacking the members of the Misfit Class. Orobas seems determined to win, no matter what. Clara is now in danger, as she wandered off into the jungle by herself.

Iruma and Lead end up being trained by Robin's relative, Barbatos Bachiko. Bachiko is very skilled and was personally asked by Sullivan to assist Robin with tutoring the kids. They were supposed to have a rather hard training schedule... but all Bachiko asks them to do is random errands. Lead has had enough of that and goes back to Robin. Iruma is left frustrated and alone. He learns that Asmodeus and Clara have been training and decides to take matters into his own hands!

"Clara's Toy Box": Iruma gets sucked into Clara's kigurumi and then is trapped inside the strange and fantastical world that's inside! Iruma turns into a child inside and out and he ends up having a lot of fun with Clara. "A Night Filled with Screams": Students start forfeiting left and right due to the harsh conditions in the jungle the first night of the Harvest Festival. Meanwhile, Konatsu, Haruno, Azuki, and Dosanko manage to find a certain location and...

Day 2 of the Harvest Festival, and the Iruma and Lead team were still at zero points, so they decide to try to get the Legendary Leaf to turn things around. With that in mind, they go visit Camui. Once they find him, they also encounter a horde of magical beasts and a little kingdom that had been established. The two are captured and suddenly brought in front of the queen of the kingdom, which just so happened to be Keroli?! Meanwhile, Ameri was thinking back about her time at the Harvest Festival, as she was watching Iruma's performance from the broadcast tent.

Ameri happens to run into Jazz and Schneider in the tent for all of the students who have forfeited. Apparently, they ran into a plot to get rid of all of the students of the Misfit Class from this competition. Around the same time, Iruma and Lead had begun looking for the Legend Leaf by using the lyrics to the Legend Leaf song as a clue. Iruma goes through the jungle, following what the lyrics said, and finds an entrance to an underground labyrinth. Deep within the labyrinth filled with traps and tricks, he encounters...

Iruma goes over to Lead's house after getting a brand new gaming console. While they're playing games, Lead's older sister Shakky suddenly bursts into Lead's room, and she seems to be in a really bad mood... Ameri and Iruma end up making homemade cookies together. But apparently, neither one of them has ever cooked something properly in their lives. They are an absolute mess in the kitchen and even Opera seems to have some trouble dealing with them...

Suzuki Iruma is too nice and just doesn’t know how to say no. One day, he somehow gets dragged into the netherworld where the demons live. He arrives at the great demon Sullivan’s mansion where he is asked to do the unthinkable... and ends up becoming Sullivan’s grandson! He is quickly enrolled into the Demon School Babyls where Sullivan serves as chair-demon. Iruma begins his super exciting school life at demon school while trying to conceal the fact that he’s a human!

The Dorodoro brothers provoke Asmodeus and Sabnock so much that they lose control and accept their challenge. However, their loss of control appears to be magical in nature...

Asmodeus protects Iruma and Clara from Orobas, but he is disqualified from the competition because he directly attacked Orobas. As they watch Asmodeus walk off, they realize that Orobas has disappeared. Ocho had taken Orobas and fled. If Iruma and his friends don't retrieve the Vase of Endings, they can't make the Legendary Leaf bloom. But they have no idea where to even start. It is then when a certain someone appears before Iruma and his friends!

The night that the Harvest Festival ended, the instructors of Babyls got together at a pub to celebrate. Kalego usually never goes to these outings, but Balam catches him and forces him to go. Robin is getting ahead of himself as usual and the group even talks about Kalego's days as a newbie instructor. What is the most important thing about being an instructor at Babyls? We also get to see what happened to Ocho after he escaped into the jungle after the Harvest Festival.

Iruma, who is going to Babirusu, wants to spend calmly so that he will not be noticed by humans. However, the entrance ceremony and a case with the entrance examination chief Asmodeus Alice have already attracted the attention of the students! First-year students Iruma and others decided to participate in the "Familiar Summoning Ceremony" event to determine the rank of the devil. The person in charge is Naverius Caluego, an extremely strict instructor in Babiru's. What kind of familiar is Iruma summoned?

Iruma, Asmodeus, and Clara end up in the Misfit Class. As the name suggests, the class is filled with a bunch of misfits and Sabnock Sabro, who wants to become the next Demon King, declares Iruma his rival. Their classes start and their first lesson is a flying race. The race was to take place in the Warbling Valley and the Cutthroat Valley. Apparently, there’s also a demon bird that lives there...

The Misfit Class is in the middle of a flying race in order to determine their ranks. Since Iruma is human, he can’t fly, so he’s riding on the back of the giant baby demon bird, but it seems to be flying off course. Meanwhile, Sabnock decides to go through the treacherous Cutthroat Valley and ends up having to battle it out with the Guardian there. Sabnock is obsessed with becoming the next Demon King, but why is he so obsessed? Are Iruma and Sabnock going to be able to make it out of Cutthroat Valley alive?

Clara isn’t amused at the fact that Ameri keeps summoning Iruma. To try to get Iruma to pay attention to her again, Clara starts to take succubus charming lessons with the succubus teacher Raim. Clara wants to get Iruma’s attention again, but apparently her sexiness is almost nonexistent. Even then, Clara sets out to charm Iruma. Will she be able to win Iruma over?

After making a promise with Ameri, Iruma sets out to try to move up a rank. Iruma finds out that there is a promotion exam in a week where they would play execution cannonball, and he also finds out it’s rather similar to a game they play in the human world. Iruma decides to train after he realizes he’s far weaker than anyone else in his class. Iruma decides that he’s not going to use magic, so he starts an intense training regimen with Opera. What does Iruma gain at the end of all this training?

The day of the rank promotion test involving execution cannonball had arrived. Iruma is ready for the match, but then ends up on different teams with Asmodeus. Despite that, the game continues with all his other classmates using their various forms of magic to play the game. Will Iruma be able to show off the results of his training?! And who will win? Iruma or Asmodeus?

Part A: A new teacher named Balse Robin, who is quite innocent and fearful of nothing, arrives! His first lesson involves interacting with familiars. Iruma turns pale at the thought of this lesson since his familiar happens to be Kalego, but... Part B: Iruma decides his next goal now that he’s moved up a rank. Apparently, there are groups at Babyls where like-minded demons gather called Battlers. Iruma shows some interest in Battlers, but then is greeted by a terrifying sound...

The Battlers’ recruiting operation, the Rookie Hunt, had begun. The seniors all come out to try to find worthy first-years to join their groups. What takes place is an immense battle! Iruma and his friends somehow make it through, but then decide to check out the various Battlers on campus. But then suddenly, Iruma’s ring goes berserk, causing him to run into a senior...

Iruma runs into his senior Amy Kiriwo in front of the Magical Apparatus Battler again. The Magical Apparatus Battler room is filled with all kinds of strange gadgets. There, Iruma hears about Kiriwo’s dreams. Babyls is about to hold their annual Battler Party where all the new students get to promote the Battler they joined. Sullivan looks forward to seeing Iruma-kun but while he’s at the Thirteens’ Dinner...