Naoi was an ordinary young man leading a simple life until one day, a disaster struck, merging various worlds. This fusion resulted in mutations in the bodies of all races: some acquired characteristics of other races, while others gained powers. However, Naoi was a rare case; he developed something different—a parasite in his body that activated his true DNA, making him half-demon and half-angel, the only one of his kind.

Naoi was frightened by this, questioning why he didn't have human DNA but instead possessed the DNA of two mythical beings. As Naoi pondered this, a voice appeared and said:

Zudck-Hello, I am here to inform you that from this moment on, all of you will be living together. You must be wondering who I am. My name is Zudck, the third ruler of the universe. You may be wondering why we are doing this. I'll tell you: we were bored with all these worlds, each with its differences, but in the end, always the same. So, we decided to merge them into a single world. You will have one week to adapt before the complete reconstruction of this new and unique universe.

Everyone was terrified by what was happening and soon started fighting each other out of fear of dying. However, Naoi remained calm and began to think: "One week, this is interesting. If this Zudck is behind all this, I hope it's something good. It seems we might gain something during this time.

Naoi-Hahaha, this will be interesting! Let the games begin.

The next day, Naoi wakes up and sees a black creature with golden details. It introduces itself to him, and Naoi wonders what kind of creature it is. The creature notices Naoi is distracted and calls for his attention.

esk-Hey, who do you think you are to ignore me like that? Seriously, is that it?"

Naoi-Hi. Well, what kind of creature are you?

Resk-I am not a creature, I am Resk, your assistant.

Naoi-Ah, so you're like a status window?

Resk-Look, I am better than something inferior. I can do things that such windows can't even dream of.

Naoi-Okay, so what can you do?

Resk: Well, not anymore. I have to finish this quickly so I can explain the rest to you. But for now, I'll explain your situation, so stay right there.

Naoi: Look, I don't have time. You can explain it to me on the way.

Naoi leaves his house to start his seven-day plan. Resk says that he can now communicate with all other races using the universal language.