The city was home to an urban legend:

"If you are alone in your room late at night, a wraith will slip through the window.

There's no escaping its blade; once you're targeted, your life is forfeit."

Only she and her master know that there's a kernel of truth to this urban legend.

Igret, a girl who was picked up by an assassination guild before she could even remember.

She was raised and used as a tool for assassination.

Highly valued because of her supernatural abilities perfectly suited for assassination, she was subjected to rigorous training.

Raised as a premier assassination tool, devoid of emotional fluctuations, she came to be known as 'Ghost'.

That day was just another job, as usual.

However, the job she received was a peculiar one, unlike her usual assignments.

The target: the eldest son of a ducal family.

A man from a ducal family with immense power, possessing martial prowess equivalent to a 'Hero'.

Having accepted a request to target an overwhelmingly powerful opponent, she was met with an unexpected encounter and unforeseen events.

Mana-Doll.

A humanoid weapon created during the era of ancient magical civilization.

A tool crafted in the shape of a young girl, designed to look, speak, and think like a human.

That encounter would lead her away from her 'daily life'.

Various incidents and encounters occur along the way.

Through them, their bond deepens.

This is the story of a girl raised as a tool, who meets a girl created as a tool, and begins to walk the path of humanity.

※Main story complete

Chapters 1 and 2, compiled into a single volume, are currently available for purchase on Kindle. Cover and illustrations by Shin Takekawa.