Reincarnated as a system in the Honkai Multiverse.

Introduction.

Disclaimer: I do not own the Honkai Impact 3rd and Guns Girl School DayZ franchise or any other non-original concept (includes Characters of different mangas, videogames, and animes, well as worlds of mangas, videogames, and animes mentioned within this story). Rights go to their original creators.

William Jacob is a 20-year-old salaried worker who has a stressful and tiring life where work takes up a lot of his time, and when he has free time after he finishes his job, he takes advantage of this time in his hobbies like playing video games, watching anime and reading manga, but his whole routine changes after a night of sleep.

In some empty place filled with darkness, we see a 1.75 tall person with dark hair and dark brown eyes wearing a salaried worker's suit.

And in this place we see a blue screen in front of our protagonist saying that he has died and will be reincarnated as a system.

You died while you were asleep. In this new reincarnation, you will be reborn as a system in the Honkai Universe.

The system is a race of entities from higher dimensions whose main function is to regulate the realities of all creation that exists in the omniverse to observe if the realities are conforming to the universal laws of all creation, as well as to combat violations committed by dishonest entities that want to bring chaos and destruction to the omniverse.

Although they are very powerful entities, they are forbidden to intervene directly with lower realities so as not to bring imbalance to them, and can only intervene indirectly by exercising their power through system users who have at their disposal a huge collection of weapons, powers, and knowledge from other universes where the user can acquire these through points earned by doing missions created by the system, and depending on the difficulty of the missions the number of points can be higher or lower, and the more points the user has at his disposal, the more chance he has to buy a skill or item of superior quality.

After the system chooses the people who will be the guardians of the realities the system has the duty to protect, the system becomes obligatorily linked to the user it has chosen and in this link it will not only share the user's emotions, pains and thoughts, but also the same fate as the user, in case the user dies, the system dies with him. The limit of users a system can choose is 14. 

Our protagonist, seeing this, didn't seem frightened or even surprised, but instead was extremely angry.

"I thought I would find peace and quiet after the afterlife, but instead I'm going to be reincarnated again in a reality worse than the previous one!"

But it is not the fact of reincarnating in the world of Guns Girl Z that bothered our protagonist, more the fact that he still remains a spectator who will have to submit to other people against his own will, as they hold in his hand his destiny in this new reality. Our Character has also the responsibility in guiding and choosing who will be the protectors of this world will be all exclusively his and the wrong choices can lead to the total failure of his mission that will lead him to his death or to a fate worse than death.

"Because of all people I had to have been chosen by a fucking ROB(Ramdom Onipotent Being) who decided to reincarnate me right in the Honkai universe, plus the worst part is that I have to take care of a bunch of idiots who are holding in their hands not only my fate but the fate of billions of lives. I wonder who I should choose."

William uses his powers as a system to see the situation that the world he has to protect is in and is faced with the fact that he has been sent to protect a universe that is about to enter a multiversal crisis caused by Honkai that will affect all parallel worlds of the Mihoyo. Upon seeing this, Jacob realizes that the world he has been sent to is the epicenter of the entire multiversal crisis.

"This has got to be a joke! So in addition to me being sent to another world against my will and yet they force me to complete a suicide mission! What is going through these guys' heads? Do they really believe that I am really ready or is this all just entertainment for these entities?"

William calms down a bit and decides to look at the privileges he gains by reincarnating as a system and notes that although his powers are limited, the access to resources he could provide to his users is unlimited, since everything he has seen in anime, manga, video games... can be accessed thanks to the privilege of being reborn as a system. This gave him a wonderful idea.

"Since I can provide every kind of resource that exists in all of creation I can also summon the most powerful beings in fiction to do the job?"

William tries to summon characters like Najimi Ajimu, Rimuru Tempest, Goku, Franklin Richards, Wanda Maximoff... But all his excitement ends when he sees the following message.

Access denied. A system can only summon people who belong to the universe to which its jurisdiction belongs. For example, people coming from other universes that exist beyond its jurisdiction, access to summons is restricted. However, a system user can summon heroes from other realities as servants which are limited by, the users power level.

This only makes our protagonist even more angry.

"Damn! Why things always have to go have to be solved through the hardest way possible! It doesn't even seem like these entities really care about what actually happens with this reality."

William begins to observe the different realities that exist in the Honkai Multiverse and after analyzing the different versions of various characters that exist throughout the multiverse, William finally makes a decision.

"I know I will regret it later, as well as what I will do is unforgivable, after all I am bringing people back to life who deserved a rest after going through so many torments in their lives, but I am left with no other choices since you are the only hope left for this doomed world full of darkness and pain. "