SSS-Rank Talent: Super Upgrade System - Chapter 103: Aquanauts!

Finding himself in an Last Airbender without an airbender around, a transmigrator waterbender goes on an adventure to stop the worst from happening to him.

A fluffy, sweet modern GL story about a mature older women and a cute university student.

When the last prodigy level esper on Earth disappeared, Earth was in deep trouble of becoming another species’ colony. The ordinary Han, with his intelligence and hardworking character, was able to make a fortune after “accidentally” stepping into the world of dark net, later purchasing an esper power crystal that brought him the ultimate power that changed the fate of the universe.

Dark net is a subset of the Deep Web that is not only not indexed by traditional search engines, but that also requires special tools like specific proxy or authentication to gain access. Dark net is not restricted by any law or morals, so the dark net market has everything that is prohibited by the law. Drugs, slaves, firearms, uranium, bioweapons, rare animals, human testing, assassination, and the list goes on. During the year of 2075 on Earth, Han Lang logged into the largest hyperspace dark net market, and our story begins.

- Description from Novelupdates

After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “Inept”!?