Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e - Volume 15, Chapter 4: Surrounded on All Sides – Koenji Vs. The Free Group, Part 7

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

Vincent Strider was a gun for hire who made a living by killing whoever it was his clients wanted dead. But during one mission, he died in a fierce gunfight. However, death was not the end for him. Vincent found himself reincarnated in another world, facing a floating interface that flickered before his eyes.[Synchronizing Host!][Military System initializing.]Vincent found out that in this system he received, he can summon soldiers, tanks, aircrafts, and even warships! This is going to be exhilarating.

The interstellar boss, Zi Yi, has come back to life.

“If it’s a barbarian you want, then it’s a barbarian you’ll get!”

Reclaimed by her noble family after being swapped at birth, Qin Yining is bestowed a hellish family instead. Just as she turns her situation around and gains acceptance, her country is plunged into danger instead.

Shades of gray color the world. No side is completely good, and no side is completely evil. Refusing to be a trophy won by men, Qin Yining carves her own path instead. In this absolutely riveting and spellbinding tale, what does our MC do when an entire dynasty is at stake?