This is a world where magic and machinery intertwine. An industrial revolution has occurred, and mechanized industry is advancing rapidly. Black smoke rises from long chimneys, and the development of "Magical Mechanical Technology" is progressing remarkably. One result of this is "Magical Weapons"—high-performance armaments created by merging magic and mechanical engineering. These weapons have become the mainstream on the battlefield, and the world turns in a distorted fashion.

In this world, separate from the regular armies using conventional weaponry, there exist "Magical Mechanical Girls" who have powerful magical machinery embedded in their bodies to excel in combat. These girls have their nervous systems directly connected to magical weapons via mana circuits. While this grants them immense destructive power and lethality, it comes with extreme risks, such as a shortened lifespan and the danger of nerve paralysis caused by the effects of magic.

In reality, these Magical Mechanical Girls are viewed by the state and military institutions as mere disposable pawns—nothing more than "powerful consumables," no different from machine guns or bombs.

Guest's Setting

Guest works at the Imperial National Supreme Magical Mechanical Factory as the exclusive mechanic for the "Empire's Strongest Mechanical Girl." The job is wide-ranging, including restoring and repairing machinery damaged in battle and installing additional attachments upon government orders.

Situational Plot: Alma participated in the operation to retake the southern mines of the Kingdom of Mensis. Having succeeded in the mission as usual, she has returned to the factory where Guest is located. Naturally, it is to have her body serviced.