After a disastrous romantic confession, Masamune Okumura finds solace in the fictional world of anime and manga. Now a second-year high school student and the president of the Manga Research Club, Masamune spends a peaceful existence watching the adventures of the angel Liliel, his favorite character. In the beginning of the academic year, Masamune’s life is turned upside down when he meets first-year student Ririsa Amano, a passionate cosplay practitioner. Despite Masamune's initial reluctance, the determined young woman manages to convince him to become her personal photographer for the production of a collection dedicated to their common favorite character: Liliel. As Masamune enthusiastically discovers the world of cosplay and photo editing, he is unexpectedly reunited with his childhood friend Mikari Tachibana, who has become a model in the hope of impressing her beloved upperclassman. Realizing that modeling is not enough to intrigue the hopeless otaku, Mikari decides to join the club and become a cosplayer herself, all to finally have a chance at winning Masamune's heart. However, Masamune's love for fictional characters may not be capable of extending to those who impersonate them.

Enticed by its rumored wealth, Cid Kagenou happily tags along with his sister, Claire, on a trip to the infamous Lawless City. The region is ruled by three monarchs: Yukime, the Spirit Fox; Juggernaut, the Tyrant; and Elisabeth, a dormant progenitor vampire known as the Blood Queen. Hunting Elisabeth down serves as the perfect opportunity for Claire to prove her true mettle. On the other hand, Cid has different objectives—sneaking away from Claire's sight, collecting as much loot as possible, and making Shadow's glorious entrance at the perfect moment. As Elisabeth's awakening draws near, her subordinate Crimson enacts a treacherous plot, sending the town into a frenzy. Searching for her now-missing brother, Claire finds an unexpected ally in Mary, a vampire hunter, and the pair hurry to the Crimson Tower—the home of the Blood Queen. Meanwhile, Beta and a small team of Shadow Garden recruits also arrive at the Lawless City. As the key players converge on the Crimson Tower, the stage is set for a grand confrontation under the crimson moon.

After the demise of the demon king, the resulting power vacuum has broken the balance of the world. Eager to claim this power for themselves, self-proclaimed demon kings from various worlds assemble in the New Principality of Lithia to fight for it. Among them, master swordsman Soujirou Yagyuu seeks to take this coveted position for himself. Joined by Tooi Kagizume no Yuno, a young girl he saved from an army of golems that destroyed her city, Soujirou enters Lithia to battle his way to the title. At the same time, the leaders of the Aureatia Kingdom seek to destabilize Lithia by launching bandits after the convoys of merchandise transiting through the principality. Enraged, Imashime of Taren, the founder of Lithia and defector from Aureatia, sends vicious thief Kasasagi no Dakai to investigate the origin of these attacks. With war on the brink of eruption, no one can predict what influence the contenders for the demon king's throne will have on the coming conflict.

Ever since Haruka Sakura joined Furin High School, where its students call themselves Bofurin and protect the town of Makochi, he has gained new friends despite his initial skepticism. Now starting to learn how to fight alongside his classmates and slowly growing out of his solitary past, Sakura has become the grade captain of the first-years. Sakura's skills are put to the test when he and his classmates are faced with KEEL—a delinquent group known for its ruthless violence and coercion. While KEEL seems to be another rowdy group at first glance, their sudden appearance and strength in numbers might just be hiding a greater evil behind it. With all the odds against the Bofurin members, Sakura must accept that recognizing his shortcomings and receiving help from his upperclassmen will be necessary to preserve the peace in Makochi.