What can the identity of a subjugated princess bring to a pair of extraordinary sisters?
The sister Hela who is "cold in nature, cold, arrogant and unkind"; the sister Helen who is "selfish and cruel, arrogant and ignorant of the world", what fate will they have in the endless national war between humans, demons, elves...?
People who are trapped will ask: Who can get their sincerity from such a pair of sisters?
And more people will ask: Why are such a pair of sisters worthy of others' sincerity?