This is the sad story of Rachel, the daughter of a demon king whose family has been captured by treacherous heroes.

The Demon King, or "Purple Flame King", was defeated by an attack by an army of thousands of humans led by a true "hero".

Rachel, the Demon King's only daughter managed to survive the war.

However, in the cemetery where she was hiding, she is discovered by a young man who came to investigate. He shelters Rachel in his home and gradually she imbues him with feelings...