MTL - The Most Beautiful Boy In Tokyo - Chapter 206 : Autumn with birds flying

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

He possessed the Xuan Gate Medical Arts and had fortuitously obtained a heaven-defying Spiritual Treasure!

The young lord of a small and weak country saves a dragon beside the sea one day.

As a lawyer back on earth, Lin Yun had never lost a case. He owed his success to three things: two blessings he received at birth (a photographic memory and the ability to comprehend anything he studies) and an indomitable will he forged himself.