The princess, who is the leader of the Imperial Army's Third Legion, has led humanity to many victories against the demonic Hellhorde. However, she has been captured by the enemy and is now imprisoned in their dungeons with her sentient sword, Ex, as her only companion. Since she is royalty, she possesses valuable information that could aid the Hellhorde in achieving dominance. To obtain this information, the demons resort to subjecting her to cruel torture methods such as tempting her with delectable food, endearing friendships, adorable animals, and pleasurable experiences.