MTL - Holistic Fantasy - ~ 2137 has a once-in-a-lifetime opportunity

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

Friend Shisui faces a life and death crisis.Meanwhile, Itachi, a devoted disciple, is on the brink of embracing his destiny as the epitome of 'filial piety' within the Ninja World.The eyes of the entire clan will soon become specimens for others, because they are consumed by an obsession they cannot get rid of.Under the watchful eye of the Konoha Corrupt Quartet, Uchiha Funan, a fifteen-year-old retired cadre of the Uchiha clan, deals with overwhelming pressure. This pressure leads him to make the decision to venture beyond the confines of the clan.

A 20 year old young chef, Kai, loved Supernatural things. He loved to read and know about myths and stories and longed for them.

One day, after closing a restaurant, a voice called out inside his head.

[Help me!]

What he didn’t know was his life would change when he met a girl, a Phoenix, who asked for his help. From her, he found out about his special constitution of being able to make a contract with Mythical Beasts.

With the power of Mythical Beasts in his hand, he would shake the hidden Supernatural World.

Accompany his journey, from being a simple cook to the Mythical Slayer accompanied by a few Mythical Beasts (Girls)!

The Earth mutated and an entire city disappeared from its original world! Su Yi arrived in the Different World strangely with the whole city, where demons ran amok, dynasty hegemony. There was no peace of modern civilization, only the law of jungle! Fortunately, his phone also changed... Gods, demons, monsters, Buddhas, fairies, etc., were all pulled into his mobile phone for his use! I am the king of demons, and I am the Lord of gods!