When God was willing to use a magical gem Edenizer to eliminate the entire mankind, an angel Philal casted a spell to break the gem. It worked, so mankind still exists. Because Philal prevented God from punishing them, she was expelled from Heaven. Thus, Philal is a fallen angel. Because God cursed on her, the soul of any human who gets along with her will be gradually scraped off by his curse. Of course, Philal doesn't want anyone to suffer, so she pretends to hate others.