Citadel for All: The Only Unit Angel at the Start of the Game - Chapter 100: World Announcement! The highest reward! Divine item! Sky City! A terrifying war fortress!

I fell into a game world out of nowhere with an instant kill skill.
And then somehow, I became a bigshot.

Waking up, Kim Hajin finds himself in a familiar world but an unfamiliar body.

After failing his college entrance exam, Li Yang had dropped out and started to support his first love. Yet after her graduation from university, she dumped him immediately.Now Li accidently takes other's chance to travel back to his high school years. With the exam answers remembered, Li decides to embark on a different path.

In a world fraught with innumerable dangers where living day by day is a struggle, a young man from the modern age transmigrated into such a world, accompanied by a peculiar system made for assassination.