After defeating the Demon Lord, the great hero Blade finds himself on the brink of death. Though he miraculously survives, he loses a significant portion of his strength. Being stripped of his immense power frees Blade from the obligation of being humanity's savior. He chooses to spend his newfound freetime embarking on a new quest, making friends. Blade enrolls at Rosewood Academy, an institution that trains prospective heroes to become bonafide champions of justice. He quickly fits in, befriending his fellow classmates and helping them through the trials and tribulations on the path toward becoming a hero.

After undergoing Benimaru Shinmon's hellish training, Shinra Kusakabe and Arthur Boyle return to Special Fire Force Company 8. However, there is no time to rest: Captain Akitaru Oubi is arrested by the military police under the influence of the White-Clad cult. Moreover, the White-Clad member Haumea—one of the eight pillars who possess Adolla Burst—has successfully brainwashed the leadership of the Tokyo Empire and infiltrated the heart of the firefighting organization. As a result, Shinra and the rest of the Company 8 squad are branded as rebels after they launch a rescue mission to save their captain and ultimately liberate Tokyo.

A decade ago, princess Krystal Novaty “Hime” Nokanatika traveled from another world to escape assassination attempts by an evil force. When she arrives in modern-day Japan, she encounters Haruto Satou. With him she shares a promise: he must forget what he has just witnessed, and the two will become friends. Now heading back to the Nokanatika Kingdom to fulfill her royal duties, Hime bids farewell to Haruto. However, when the young man suddenly remembers his first meeting with Hime, he rushes to the location where she first appeared and crosses the dimensional portal to be reunited with her. His arrival disrupts the marriage ceremony between Krystal and prince Marmarugias Gisaras. The wedding is brutally interrupted by the attack of an abyss monster who threatens the princess' life. Acting impulsively, Hime decides to exchange rings with Haruto, which grants her new husband light powers that permit him to slay the monster. Now dubbed as the Ring King, Haruto must marry four other princesses to acquire new magical powers and have a chance to prevail in his fight against the enemy of the world: the Abyss King.

Mitsuha Yamano could not have had it worse. After failing to enter her university of choice and losing her entire family in an accident, she finds herself plummeting off a cliff due to an especially fragile guardrail. Through what seems to be the only bit of the fortune left in her life, Mitsuha's firm unwillingness to die allows her to be transported to another world, where she ends up surviving. In this foreign land, Mitsuha wanders around for days before collapsing from exhaustion and being rescued by a little girl named Colette. Not long after, she finds herself in yet another life-threatening situation, and her indomitable will shines once more, granting her an audience with a divine cosmic being. The entity reveals to Mitsuha that she has acquired not only superhuman regeneration but also the ability to transport between worlds at will. Armed with this new information, Mitsuha brainstorms ways to utilize her newfound power to its full potential. Realizing that she can take goods from Earth and resell them to the other world at a higher price, she resolves to save up eighty thousand gold coins to be able to retire comfortably.