Fairy Fencer F: Advent Dark Force is a fantasy role-playing video game developed and published by Compile Heart as a expanded version of Fairy Fencer F. The game was released in Japan on November 5, 2015 and in North America on July 26, 2016.
A long time ago there was a conflict between a goddess and an evil god. The two deities didn't fight directly, but created a large number of special weapons for others to use. Eventually, these powers sealed each other and the power vanished from the world. Fast forward to modern times where these leftover weapons are called "Furies" and warriors that wield them are "Fencers." Fury weapons are said to be incredibly powerful, so Fencers constantly scramble to acquire them. By a strange coincidence, two fencers, Fang and Tiara, get caught up in the struggle between the goddess and evil god.