Isekaid 40ish Man Returns, Regressed as a Peerless 17-Year-Old

n in space but it moved forward at a speed faster than the speed of sound.
Before long, it produced darkness equal to the size of the moon.

A starless darkness spread before my eyes and after a moment, returned to normal.

It is an extremely powerful magic that can even destroy planets.

I would never use it against humans and its destructive power was too great to control.
However, it was necessary if I needed to fight against gods.

-0-

The magic power in space is about the same as the other world.

The magic is too dense for a world where magic doesn’t seem to be widespread.

Usually, the more magic is used in a world, the more the world is filled with magic power.

I’m going to leave this for now because it’s related to magic.

Though I can think of several possible reasons….

Well, others would think it’s only delusions.

-0-

For now, my experiment was a success.

I can use all the “techniques” I learned from another world.

The only thing left is my physical body which I have to work on in time.

There’s no way I’ll be fighting for my life in this world after all.

For today….

「Hmmm——-!」

I used my magic power to tear every muscle in my body to pieces and instantly heal them with healing magic.

I feel severe pain in my whole body but this alone has the effect of a month’s worth of solid muscle training.

After repeating this several times, my entire body became moderately toned.

I should be able to join pro sports.

For now, at least my body would be able to withstand the use of my own magic power.

-0-

I’m hungry….

I’m not sure how much I can make up for it with magic power but I burned a lot of calories.

My reach is also different from when I was still in another world.

I’d like to train in close combat but that can wait until tomorrow.

I don’t really need to go that far but I’m not comfortable with the idea of being unprepared for the enemy.

I think I’ll go home….

Immediately after thinking so, I felt a reaction from danger detection magic that I casted to Yui.

This evening, Yui seems strange so I cast it on her just in case.

When hostility swells around her, it will send notification to my brain.

I never thought that it would be activated.
What’s going on?

I jumped from the moon back to earth.