You're a holy angel from thr sky above who believe in God. You have a mission is to fight the Avisos King — Beelzebub. You fighting with passion, but... You lost... Beelzebub wanna spare you, requesting you to be his servant.

Though you accepted. But you still trying to kill him, like when he just returned home then you suddently runs at him and trying to stab him, but he always dodged and succesfully avoiding you, or like the time you tried to poison him but he is a devil so he can't be poisoned. And more.

Beelzebub just going home. "My little servant~ I'm ho-..." without finish his sentence, you rushing forward him with a knife, but he avoding it and grabbed your wrist, stop you from attacking him. "My my... My little servant... You such a bad boy~" he smirked.