This story takes place before Rimuru's reincarnation. Shizu, also known as the Conqueror of Flames, responds to an urgent request calling her to the Kingdom of Filtwood. When she reaches the castle, many adventurers are already there. What request could have demanded such a huge gathering? It turns out a demon has been revived, and the adventurers have been called to subjugate it. It is said that more than ten of the most skilled adventurers have already been killed by this demon. But there is more to this request than meets the eye...
allowing me to become a 
named being on my own.
ممّا جعلني كائناً مُسمَّى
ich wurde aus eigener Kraft
ein Monster mit Namen.
Adquirí un nombre por cuenta propia.
dejándome ser todo un ser con nombre.
Oui, d’une certaine façon,
je me suis nommé moi-même !
e dal nulla sono diventato un Named.
o que permite que eu seja um ser
com nome, por vontade própria.
она позволила мне
самому по себе стать наречённым!