Metropolis: I Stayed in Seclusion for Three Thousand Years Before Coming Down the Mountain

A big boss in the fairy world has been in seclusion for three thousand years, and wakes up to find that only three years have passed on earth - the little girl he adopted back then has just entered college, and the registered disciple he accepted back then has become the richest man in the world. However, he just wants to be a salty fish in the city, but he is always regarded as a "hidden peerless master".