A hero novel about adolescence, painting justice and evil. Some province, some region somewhere in Japan, Tsukimori City. Structured the same as any other city, Tsukimori has just one point that sets it apart from the rest. That is the fact the city is protected by a single hero. A young girl who usually lives her life as a high school student, Mia. Whenever the kaijin of the evil organization Calamity Co. Leviathan threaten the peace of the city, she transforms into a hero and fights day and night. A young boy, her childhood friend Takeru watches over her work as a hero. A normal high school student with no redeeming features, Takeru had a certain secret—that he himself was the leader of Calamity Co. Leviathan, Lord Helvenom. Takeru’s goal, it is all for Mia, fated to live as Gaimoon, forced to battle evil for the rest of her life, to continue standing as her sworn foe. What sort of fate awaits the relationship of evil leader and hero? To protect those they hold dear, the battle wages between beloved. This is a hero novel of justice and evil!

Some decades ago, monsters appeared from another world. A high schooler living in Tokyo, Kuzumi Daigo received a mysterious message through the game application Social Spirit Jeager, and, as a result, went to Mitaka Station. There, what he saw was an enraged goblin, and the form of Takayashiki Runa who had just defeated said goblin. Using fairy magic and our weapons, let's suppress those otherworldly monsters!

Kotomono. They can use their "Testemonial Verse" to alter the brain, usually take a different form to humans and see the world in away that differs from ordinary people. Since 27 years ago, after their existence was announced to the public, society has been trying to find a method for humans and Kotomono to coexist. Now in the present, an outbreak of Kotomono assault incidents have been taking place across the country. Mutou Goro (Logo) who has been following the case knows the criminal is his childhood friend who he had parted with 6 years ago, Maki Narumi. Now spell out the words of your "Testimonial Verse"; The illustrious poem of humans and Kotomono. (Source: Wikipedia)