The Son of an Old Friend? or the Old Friend Is Still Alive

No Wonder He Looks Like an Old Friend, He Turns Out to Be His Son

Is there such a thing as an old friend? It turns out that he is the son of an old friend, and then this old friend's son is the heroine, preferably a group of people who practice immortality and fantasy, even better. Then the heroine used the same moves as his father or mother, and was recognized.