Seiichi arrives at Barbador Magic Academy, where he's appointed as the new teacher in charge of F-class, a group of problem students, in order to save the academy.

Seiichi meets the extremely eccentric students of F-class and gets stuck playing the straightman before the class' old teacher, Beatrice, suggests mock battles so Seiichi can assess their abilities.

Seiichi engages the students of F-class in a mock battle and learns about the major problem they face while Kannazuki continues to sniff him out at the school.

Seiichi is finally reunited with his childhood friend, Kannazuki Karen, and they talk about Seiichi's childhood and his bullying until Oliga notices the Enslavement Bracelet around Kannazuki's wrist.

Seiichi spends time training F-class for the upcoming class competition, but when the day finally arrives, Seiichi is nowhere to be found, leaving F-class to defend the academy from the apostles of the Great Devil Order!

With the students of F-class defeated, their beautiful teacher, Beatrice, rises up to protect them and fight the apostles assailing the academy.

Seiichi and Airi are sent to the world of the dead by Demioros' Deliverance and have to search for the Gate of the Living and overcome its trials in order to return to life.

While the Guild hosts an audition full of perverts to find new members to join them for the alliance summit, Louise makes her way wounded to Seiichi and explains the fate that befell Zakia at the hands of the Great Devil Order.

While Seiichi is away from the Academy in Wimberg Kingdom, Gempel the Doppelganger casts off his disguise as Airi and attacks each of Seiichi's allies in different guises.

Vitor and Guscle go on a wild goose chase investigating the murder of a man who wasn't killed before Vitor reveals his true identity and their newly forged bonds are tested in an all-out brawl of macho proportions.

Barnabus reveals the truth behind the Fruit of Evolution, the Great Devil, and the creation of this world, but before Seiichi and his party can process it, Destra attacks and the final battle begins.