Everyone controls the beasts, and alien creatures attack the earth. The protagonist's father resisted desperately and was about to win, but he died on the battlefield in order to block a sneak attack for his team members. Before he died, he entrusted his comrades to help him take care of his wife and children. Unexpectedly, the comrade-in-arms agreed on the surface, but later did not regard his wife and children as human beings, made things difficult for him, and was full of teasing in his words. He even kicked the couple out of the pension house, and instead let his little lover live there... The protagonist grew up day by day in this kind of life. When he grew up, his biggest wish was to seek justice for his mother. During the awakening ceremony at the age of 18, the male protagonist only awakened a C-level spirit-tailed fox. He thought that the road to revenge would end there. As a result, the system awakened at the critical moment, helping the protagonist quickly become stronger and embark on the road of revenge again.
