The Unvanquished: Child of Nihility - Chapter 6: Silence

In the Wasteland Era, four grand circular walls separates the world of humans from the Exotic Species, which people also refer to as the Apocalypse Circular.Lu Luo has unexpectedly arrived in this world and, feeling somewhat helpless amidst the sudden crisis, has seen this prompt in his vision:[You are so weak it's suffocating, Although you have awakened Grade S-02-Devourer and Grade S-04-Fusioner, it's actually pretty useless.The only thing that can truly help you escape this crisis and lead you to the pinnacle of life is Sequence S-11-Observer.][The above evaluation comes from the noble Grade S Sequence-11: Observer's fair analysis.]Lu Luo: “? This evaluation, so fair huh!”

Ye Zichen was just a normal university student. Or so he thought.

Back in 1991, in the face of this golden age, Chen Jianghai swears that he will only live in three words in this life: Lin Wanqiu! The story of a reborn person who built an electrical empire and reached the pinnacle of his life!

- Description from novelbuddy

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.