Giceria Empire.
A coup d'etat occurred 15 years ago, and the king replaced it.
The current king, Valon, imposed heavy taxes on the people, but the
Imperial Army is the strongest and the country itself is safe.
Although the people suffered heavy taxes, many did not complain.
Rietta-Fane is a girl who lives as an adventurer in the Giceria Empire.
She was raised by Negel, a sword master, from the time she became aware of her, and she doesn't know her parents' faces.
While living as an adventurer, Rietta was looking for someone to kill Negel.
One day Rietta receives a request for aristocratic escort in the guild.
However, on the way, someone attacked me ...
--The girl now confronts her destiny.