MK?

After spending a wonderful day in Alfheim, I received a gift from Firis and Nol, before I told everyone how strange this world was, when I finished telling my story, Firis gave Nol a knowing look and then took something out of her ring and handed it to me with a suspiciously flirtatious smile.

Nol didn't say anything but she seemed to agree with whatever Firis was up to.

A simple wooden box.

Well, it was actually a box within a box, hermetically sealed.

On top of it was a manual.

Firis emphasized that I didn't open it until I was in my world.

I didn't think about it much so I put it away.

After saying goodbye, I went back to my world.

It was just after midnight and the house was silent.

They were all sleeping, I quietly opened the door and took out the box.

Inside was a small jar, before I knew it it evaporated, a green substance moved quickly, it seemed like a living entity and it approached me.

I didn't feel any danger, however that green cloud seemed very docile as it moved like a puppy waiting to be caressed by its master.

I heard this green cloud purr, it seemed delighted, after a few seconds I saw it slapping itself as if it had lost its concentration.

'...'

With a reluctant look she turned around.

After a few seconds it was blown away with the wind, I saw this split and spread through the air in many directions.

A short breath was enough to disappear.

No one could see this because this green cloud was at a subcellular level.

It was a virus.

'...'

I held up the notes, they looked like some instructions or a simple message.

I never really read the instructions.

[MK virus]

<Dear master, this little friend is called "Male Kill Virus", do you remember that you taught me alchemy and the art of creation? This was my first great invention, a gift just for you. I hope you treat her well... sincerely: Firis

Psdt: I hope you enjoy it>

'...'

It was not necessary to say what this virus did, since the name was enough to summarize its functions.

A tired sigh escaped from my chest, I went back into my house to see Yukino who was still in my room.

In a few hours things would get crazy, too crazy.

Should I stop it?

Let's leave it to chance.

Take out a gold coin, place it on my thumb and limit my strength.

Flipping a coin was the best way.

With a fussy sound it began to spin rapidly, after a few seconds it fell to the ground, the coin hit the ground upright and didn't seem to have any intention of falling anywhere.

'...'

That's a no?

I tried again with other coins and items, but the result was the same.

Apparently it was a resounding no.

...

In fact it was just like Ryou said, things were crazy.

It is worth mentioning that this world was like Alfheim.

The normal thing is that a world follows a single pattern, a single energy system, a single way of evolving, but this world was not governed by these rules.

This world contains Qi for cultivators, it should be a world full of cultivators, right?

But this world also had mana.

If there is Qi for cultivators, where did it come from?

Qi was known to come from the "Heavens", but there was no "heaven" to suppress this world and its inhabitants, nor was there divine retribution to punish any offender, but Ryou could still cultivate.

There was also magic and mana, but this world wasn't connected to any magical network that would allow this, but still Ryou's spells reached monstrous levels, even in advanced worlds many people would be afraid.

Let's not get off topic.

The [MK Virus] should have taken at least three months to kill all of her victims but it only took half an hour.

It is necessary to mention that this world was slowly mutating, the virus evolved after touching some liquid mana and her task became easier.

While all this was going on, Ryou was spending time with an embarrassed Yuki-Onna.

...

*Beep* *Beep*

"Ryou... hm... I think it's an important call... you should answer," the room was a bit dark, Yukino somehow became shy after doing it for the first time.

Ugh... who's bothering at this hour?

Mother, what does that woman want at this hour?

"M-mother...", Yukino repeated those words with some embarrassment. She somehow blushed at the contact name.

Yukino was almost the same age as my mother, I couldn't imagine Yukino calling her "mother-in-law".

I pressed the button to answer and before I could answer a desperate voice began to sound.

"Ryou, are you alright!? Nothing happened to you, RIGHT!? You don't feel bad? Please speak up!"

'...'

"Mom, I'm fine, what happened?", it was a bit annoying to hear yelling through a phone but since I decided to answer it I could only blame myself.

I heard her sob for a few seconds as she seemed to quickly pull herself together.

"I-I'm so glad, I wouldn't know what to do if you died... a lot of people have died all over the world...", she then started to explain what happened.

In an inexplicable way many men died in a short time, their skins turned purple, apparently they could not stop their vomiting of blood and in less than a minute all those infected died.

Reports from around the world showed that this problem had reached all levels of the world, no country was spared.

'...', it's too fast.

My calculations were wrong?

That virus should take at least three months, but it hasn't been more than an hour and it has already spread all over the world?

*Ding*

<New mission>