Sage, Don't Marry Miss Demon King!

The great human sage Ron, the creator of the new school of magic and the spiritual mentor of thousands of adventurers, worked hard to train a generation of disciples, just to destroy the devil and bring a hundred years of peace to the North Empire. But things didn't work out as he wished. At the age of forty, his strength declined drastically and his combat effectiveness plummeted. "Sage Ron, you can no longer keep up with us." So the sage left the team. I thought I would return to the countryside to spend the rest of my life, but I didn't expect the demons to come to my door. "Lord Sage, we need your wisdom to assist Lady Lilith in becoming the Demon King." In this way, the great sage who was abandoned by humans married a demon noble girl and worked hard to make her ascend the throne of the demon king. ..... Several years later, the atmosphere in the throne hall of Demon King City was so solemn and suffocating. The brave team F4 has overcome difficulties and obstacles and finally arrived here. The moment the hero raised his holy sword, he saw a familiar yet unfamiliar face beside the female devil. He is a sage in his youth! Everyone was stunned. Their teacher, their benefactor, the person they admired, the person they respected the most, not only returned to the appearance of his youth, but actually bowed down before the female devil sat down. "Teacher?" "Impossible..." "Ron! You... You... Why are you here?!"