Aku no Meshitsukai

A kingdom known as Lucifenia, often referred to as the "Kingdom of Yellow," was governed by a fourteen-year-old princess named Rillianne, who ruled with absolute authority. Her harsh rule led to widespread exploitation, and those who disobeyed faced execution. She was nicknamed "Daughter of Evil" by the populace. Allen, a servant resembling her, remained constantly by her side. Her self-centered decisions triggered a war that resulted in numerous deaths, setting in motion a hidden mechanism of fate that would soon spiral out of control.