After defeating Dante, Alus returns to the Institute, where he meets an unexpected visitor from the Trojan Prison. Tesfia and Alice, both wounded in the battle against the escaped prisoners, resolve to face a new trial bestowed upon them by Alus. The noble faction under Major General Morwald awaits their chance to strike back at Alus’s superior, Governor-General Berwick. And the mysterious and beautiful Magicmaster Noir makes an appearance!

The Seven Nations Friendship Magical Tournament, where novice Magicmasters compete, has finally begun! Alus participates in the tournament while hiding his identity as the ranked No. 1 Magicmaster. As Tesfia and the others compete in fierce battles against rivals, Alus’ victory seems rock-solid as he displays overwhelming power. But a development that could rock the world is happening behind the scenes... The female Single Digit Magicmaster Lettie also makes an appearance in the tension-filled fifth volume of The Greatest Magicmaster’s Retirement Plan!

In a world where the Fiends run rampant... Magicmaster Alus Reigin, the young prodigy that has defeated more Fiends and reclaimed more of humanity’s lost territory than anyone else alive, requests retirement from military service at age 16. But due to the twists and turns of fate surrounding his status as the No. 1 Magicmaster in the nation—the top Magicmaster out of more than 100,000—he ends up as a student at a special magical institute, hiding his identity and training his successors – a pair of beautiful Magicmaster girls! Not to mention continuing to defeat Fiends in secret... Get ready—the epic adventure of the Greatest Magicmaster Alus Reigin begins now!

On the night before the Friendship Magical Tournament, Alus receives another mission. Peaceful times for Alus and his friends come to an end, as Tesfia is forced to consider an engagement. Meanwhile, Alus has to face off against a strange attacker that suddenly appears at the Institute. At a conference of the rulers of the seven nations, even Alpha’s beautiful ruler, Cicelnia, approaches Alus. When Alus is suddenly appointed to guard Cicelnia, he meets the other nations’ rulers and the Single Digits that guard them. An uneasy atmosphere pervades the conference, as the nations vie for power. With the Friendship Magical Tournament looming on the horizon—trouble stirs!