A Cast of Malleable Characters

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Mey Kashika is the person in charge of the BDKS0402 mixed universe, and lives in the main world.

Her auxiliary System is called "Ensemble Performance." To minimize overlap with the native inhabitants, all her secret identities are modified versions. One day, Mey receives an urgent notice from her superiors: several "Phantom Books" have been lost in the main world where she lives.

They are books from an ancient library that should have been burned or lost. They record things that should never have existed, such as lightning strikes, the summoning of monsters, and the secrets to obtaining demonic power. Reading them correctly grants countless blessings, but also threatens to throw the world's balance into chaos.

To keep the universe stable, Mey immediately activates the literary genius secret identities with the strongest affinity for the "Phantom Books." As a result, the following appear in the main world:

#Kindhearted Special-Grade Cursed Speech User Tsu-shima

#The Twin Sisters of the Zenin Family, Born with Heavenly Restriction

#A Spicy Curry Fan with Measurable Precognition

#The Phantom Book Keeper, Blue-Eyed Reader Girl with Glasses

#Arakabuto, the Primordial Goddess of the Living Galaxy

#Miss Mori, the Magical Girl of Love and Peace

#A Parasitic Holy White Tiger Exorcist Boy

#A Crystal-Type Holy Golden Butterfly Cult Doctor

#The Cat-Loving Gold King and His Clan

#Two Yasha Users with the Same Kind of Supernatural Ability

Guardians of books from worlds of different possibilities descend upon the main world. They all take orders from the girl they call the "Librarian," and have only one goal: to retrieve the Phantom Books.

Mey diligently follows the script while retrieving the "Phantom Books." When things finally seem less urgent, she realizes that the main world's chosen ones have all fallen for her, while mistaking her secret identities for love rivals. Fake and real romantic rivalries collide, and her peaceful life is gone for good!

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Theme: There are many things in this world that you don't need to understand.