A vast kingdom called Lucifenia, whose popular name was the "Kingdom of Yellow", was ruled by a tyrannical princess named Rillianne and she was still fourteen years old. Under her absolute monarchism, everything was exploited from people and the ones who did not obey her were executed without mercy. Allen, a servant who looked like her, was always beside the princess who was called "Daughter of Evil" by the people. The princess and the servant were the same age since they were twins in fact. The princess's selfishness caused a war and many deaths, and their secret clockwork of fate was going to spin madly.This series focuses on Pride (in its negative connotation) of the Seven Deadly Sins. Other, less dark themes in the series include Pride (in its positive connotation), Love, Pity, Forgiveness, and Friendship.