MTL - Cannon Fodder Counterattack Investigation System - Chapter 90

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.

The world is made up of the five elements, and it could be divided into Yin and Yang.Beneath the heavens, on the ancient divine center continent, billions of lives thrive in the prosperous era of the cultivation.Across its vast lands, happiness, sadness, reunion, and separation played out in the long lives of those seeking immortalhood.Light is always accompanied by darkness, and under the radiance of the heavens, there are silent shadows moving about…

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

This is a story about the pursuit of victory.