Master of the Stars - Chapter 1: Massive Earthquake

One day, I was given the mysterious power of Hwanmong.

His name is Gao Yang (高阳), not a lamb (羔羊: gāo yáng), okay! If a gentle sheep gets upset, it will bite. Believe it or not!

Gao Yang a sheep in wolf’s clothes: Don’t come again! Otherwise, I will be rude!
Qin Shaoyan: Oh? Why not?
Gao Yang: I… I… won’t cook for you!
Qin Shaoyan: It doesn’t matter, just eat you.
Gao Xun: What if Dad dies after being eaten by Father? Waiting online, urgent!

- Description from Novelupdates

Joshua woke up in the middle of a battlefield one day only to discover that he has been transmigrated into a popular MMORPG, Continental War. Discovering that he has not only been displaced in space but also in time, Joshua realizes he has knowledge of the events unfolding around the world as he had played through them as game events. Read on to discover how Joshua forges his path towards becoming a legendary warrior!

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.