I, the Good-For-Nothing Brother, Have Signed for a Million Years at the Beginning

He traveled to the prehistoric world and became a disciple of the Lord Tongtian, but he didn't want to be considered useless because he couldn't practice because of his special physique. In the end, he had to rely on the sign-in system to live his life. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.