Welcome to Demon-School! Iruma-kun

The students of the Abnormal Class receive special instructions. Everyone in the class must achieve promotion to rank four by the time they enter year two. They will be forced to leave the Royal One they fought so hard for if they fail to achieve this. The Harvest Festival is the next event where the students can increase their ranks, and the school prepares an exceptionally powerful team of instructors to help them improve their abilities in the limited time frame. Iruma and the others start their extraordinary training the moment the new semester begins.

Iruma and Lied receive special training from Robin's relative Barbatos Bachiko. Bachiko is an influential figure, and Sullivan asks her to serve as a lecturer while helping Robin. They think the training will entail days of difficult work, but Bachiko only orders them to run errands and perform odd jobs. Lied gives up and returns to Robin, while Iruma burns with frustration and continues alone. Aware that Asmodeus and Clara are working hard with the special training, he decides to take action!

Iruma finally receives special training from Bachiko, the best archer in the Netherworld, who stipulates that Iruma must make his own bow. Iruma makes a bow with the Magical Apparatus Battler to imbue magical powers into Kanakiri Osa feathers. However, Bachiko rejects the bow and tells Iruma it is essential to follow his own ideas when making a bow.

The last battle for the first-year students of Babyls Demon School, the Harvest Festival, finally gets underway. The Harvest Festival is a survival-style promotion test that takes place over four days. Students hunt magical beasts and plants living in the jungle, and whoever earns the most points within the time limit wins. The students of the Abnormal Class are fired up and feel a sense of rivalry after completing days of intense special training. To the jungle where dangerous monsters lurk!

Asmodeus and Sabnock hunt their prey with overwhelming force, and then Ichiro and Niro, two strong contenders known as the Dorodoro Brothers, appear before them. The Dorodoro Brothers challenge Asmodeus and Sabnock and offer to give away all their points if they win. At the same time, Kerori and Kamui fight numerous demonic beasts, while Jazz and Schneider strategically earn points from others. Will the hellish days they spent training under General Furfur pay off?

Iruma and Lied enjoy a carefree meal with ingredients harvested in the jungle while the other Abnormal Class students steadily earn points. For the first time in a long while, Iruma is aware he is in a survival situation and feels a survival high. The pair prioritize their survival and enrich themselves while ignoring the Harvest Festival. They reminisce about Devicon and have a fun and exciting time, but a suspicious figure sneaks up from behind.