Bloodline of Gods: The Genius at Olympus Academy! - Chapter 71 - . Crimson Star Bear

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.

A failed investor from 2017 got drunk and woke up in the 1980s. China is just opening up, and the economy is blooming. There is also the dissolution of the Soviet Union, the bursting of the Dot-com bubble and other financial crisis. He used his knowledge of the future and slowly build up his empire.

- Description from novelupdates

[Urban Bestselling Epic about the War God] “Sign it, today you must divorce that loser, Ling Fan—you’re not ashamed, but I can’t even lift my head when I go out,” my father-in-law emphatically tapped on the divorce agreement. Three days later, good son-in-law, you rise above the petty, I beg you, please don’t leave my daughter... Three years of tempering, a work of craftsmanship, the legendary War God’s ascension journey....

Inside the 3000m underwater station, an international group of scientists and engineers live and research for possible settlement of entire human race. Park Mu-hyun, a reserved dentist joins the station in hopes for a quaint life in the deep sea. However, things quickly go south when the station gets attacked by a mysterious group of people.As the water starts to fill in the living quarters, Park Mu-hyun grabs his backpack and immediately runs for his life, but where to? Now, the peaceful station becomes the ultimate survival stage of cult madness and chaos.