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So many regrets, so many expectations, you know? ... Xu Dongjun, who came back from rebirth, has a "proficiency system" in his arms. As long as he persists in anything, he can improve his proficiency. So... I will first become a top student and make up for the regret of not being able to get into college.

Xu Hao traveled to a world where demons were rampant. Here, there are red-trained demon foxes that charm all living beings and control people's hearts; there are skinned evil spirits lurking in the world, choosing people to eat; there are bloody Shura who run rampant, slaughtering villages and destroying cities. There are even demons with great power that stir up heaven and earth, causing chaos in the world. But. "I can't save the world, I just want to save myself and achieve immortality by 'devouring' myself in this world." It all started when Xu Haochuan discovered that his predecessor was killed by a demon...