MTL - My Teammates Are All Crazy - ~ Fanwai: International Invitational 4

When necromancers perform a great ritual to summon an undead servant, they bring a powerful vampire into their world. And now, their fate is sealed as food, but for Klaus, this is just the beginning of his adventure. In a cruel world where people will do anything for power and immortality, he is already very strong and immortal, so what's left if not start a family and have fun stepping on arrogant people through the way?

Many strange phenomena have been happening in Yin City. Li Ang—whose alias is Li Risheng—becomes embroiled in an absolute real game of life-and-death, known as Killing Field.Using his above average analytical and deductive skills, he completes different quests assigned by the system, such as eliminating supernatural beings or solving cases, while trying to unravel the true nature of the game.

Ten years ago, Joseph Cassian was thrown into a maximum-security prison for crimes he didn’t commit framed by the very family whose blood runs through his veins.Now, at twenty-eight, he walks free into a world where the city’s mafia empires have mysteriously crumbled. Their leaders, slaughtered. Their empires, burned.All while Joseph sat in silence behind bars... no one can prove he did anything and yet it all happened as if he planned it.Was he just a wrongfully imprisoned scapegoat, a man who survived injustice?Or is he a mastermind a Don who orchestrated revenge so flawlessly that not even he had to lift a finger?Now that he’s free, Joseph stands at a crossroads.He can leave the blood behind, walk away from the ashes of an empire that once owned the city.Or he can claim what’s left of his legacy and become the very Don the world has feared all along.

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.