What Should I Do If the Weak Demon King I Picked up Turns into a Yandere?

The evil seal guarded by the demon king was broken, and the demon clan began to commit crimes in the human world without restraint. A corpse that has been dead for a week but can still maintain body temperature and hair growth; a shadow that killed itself; a deadly thread that suddenly grows in the human body... As the director of the Special Case Bureau, Le Wuyou had been idle for decades, but suddenly became busy, and his heart was full of resentment towards this demon king who had neglected his duties. Rumor has it that the Demon King is the number one in the world and very cruel! Before Le Wuyou could come to ask for an explanation, the demon king actually came to the door himself. And he also lost his memory! In line with the principle of not bullying others, Le Wuyou originally planned to help the Demon King recover his memory before settling the score. But... Demon King (referring to Le Wuyou): This barbarian is the director you mentioned? Le Wuyou raised his eyes coldly and rolled up his sleeves: Today I will let you know why the flowers are so red! Before he could take action, the legendary demon king with the strongest spiritual power in the world coughed weakly and took care of his long silver hair with a delicate comb: Well, handsome guy, can you add me to WeChat? Le Wuyou:...? The exquisite demon king with a poisonous tongue but weak body * The cool but cold-hearted director with ruthless horns Note: Le Wuyou's Le Nian Yue