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This is a fortress society where the weak eat the strong, and the untouchables can only be kept underground... Wasteland, beast control, ancient martial arts, cyberpunk, bionic technology, fortress world... Everything started with the time travel of a crystal skull!

I was reborn as a security guard at the Beast Control Academy. Facing the proud students of the academy, I felt inferior and ashamed. With only a high school diploma, I was a pariah. How could I be able to beat them up... Oh no, protect them! [Gold Finger: ① Replicate the ability of the alien beast, ② Replicate the ability to advance.