Books containing the intense emotions of the author, sometimes with the power to force the death of their readers, these books are known as "cursed tomes". The role of the Imperial Library Intelligence Asset Management Bureau, nicknamed Fukurou, is finding and retrieving these books. As a result of the incident with her brother, Tsugumi has gained the ability to see the auras around cursed tomes and decides to join Fukurou to put her new powers to use. However, she finds Fukurou full of rather unique members such as Ozaki Hayato with a sharp-tongue and a strong sense of justice, Kougami Akira who has difficulty with people, and Hoshikawa Hisui with mismatched eye colors.
Hello, hello! I am the head of the 
Research Division, Mashiko Motofumi.
.وا عجبي، أنا رئيس قسم الأبحاث، ماشيكو موتوفومي
Du liebe Güte! Ich bin der Leiter
der Erforschung, Mashiko Motofumi.
Vaya, yo soy el jefe de investigación,
Motofumi Mashiko.
Vaya, yo soy el jefe de investigación,
Motofumi Mashiko.
Bonjour ! Je suis Motofumi Mashiko,
chef de la section de recherche.
Guarda, guarda...
Ora ora, sou o chefe do departamento de
pesquisa, Motofumi Mashiko. Prazer!
Ох, ох! Я глава отдела
исследования, Мотофуми Масико.