The old enemy I killed with my own hands in my previous life became my "portable grandpa" after being reborn - but he didn't know that I was also reborn.
"Old Enemy System" - After the death of the enemy Gu Lingxiao was reborn, his soul parasitized in the body of the protagonist Lin Chuan. In order to change the defeat of his previous life, he had to teach him top-notch skills, combat experience and secret realm strategies. Lin Chuan appears to be obedient and does as he is told, but in fact he repeatedly jumps between "waste acting" and "real learning and practical application", squeezing all the value out of his rival.
