Demon Prince 9

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Chapter 9. Elmbarn Yuu's Plan

"And so, you see, magic has its own suitability~"

"Oww"

My brother is teaching me about this world while I'm still unable to move.

Mother Eliza and the maids around us are watching with smiles on their faces.

To an outsider, it would look like a child eagerly teaching his little sister what he's learned.

In reality, it's crucial information transfer for us, continuing from our previous lives.

But I'm sorry, brother...

It seems like the Sage's Crest I possess knows everything.

The ability of the Sage's Crest I hold enhances magical abilities and accelerates thinking when used.

And the Sage's Crest is a collection of information. It tells me what I want to know.

About this world's history, maps, races, magic, and crests.

It's like a web search function from modern Earth.

Of course, there are things it doesn't know.

For instance, it can tell me the location of known mines but not undiscovered veins.

It doesn't give details on abilities that vary by individual personality.

It can't predict the future.

Still, it's an incredibly convenient ability.

I think it suits me.

And the first thing I looked up was...

The marriage system of this country.

Yessssssss!

I pump my fist in my mind at the results I found.

This country practices polygamy.

And marriage between siblings is also allowed.

As expected of another world! As expected of a parallel world!

Viva another world! Viva parallel world!

In this world, the age difference between my brother and me is just three years.

If marriage between siblings is recognized, then there's no problem at all!

The only issue is how to get my ultra-dense, oblivious brother to be interested...

In my previous life, I made quite obvious advances, but it was like wind to a willow, pushing on a curtain, nailing rice bran.

Considering my brother also remembers his past life, he's likely against sibling marriage.

However, I'm now a succubus. A being who charms and seduces men.

Using that power on my brother...

No, that's wrong. That feels off...

Besides, I must make my brother happy this time...

Forcing it isn't ideal. It's a last resort.

Then what should I do...

I have to change my brother's mindset and values.

In that case... I'll use polygamy.

A harem.

As a former Japanese, he would be unfamiliar with polygamy, and being in such a situation would drastically change his values.

If that happens, he might become more accepting of marrying his sister!

I don't want other women marrying my brother, but...

As long as I'm the main wife, the No.1, it's fine.

I can't move or speak now, so I can't act on my plan yet,

but at least I can start picking potential harem members from those around us.

"And so, there's also this kind of magic~"

While my brother eagerly explains, I'm plotting my plan.