The story is about a little girl and a mecha boy.
The plot is that there is a abyss lies in a country. And the people goes there and collect some ancient ruins are called miners. The plot is that one of the greatest miner gone missing in the abyss. As time flows differently from earth to abyss no one actually know if she is alive or not.
The daughter of the miner receives a letter from her mother.
Even though she was not ready yet she started her journey with the mecha boy.
The whole plot is about the journey in abyss.
Also there are some plot twist which are much exciting.
Artworks are amazing, the characters are good
Overall enjoyable.
