My relationship with the current family head aka my brother has always been bad.
'How could it not be?'
The eldest son of a mage family, yet a dullard. Meanwhile, the second son is called a genius.
It's a relationship bound to be compared.
"Especially in a family like Mars, where skill is valued above all."
If our parents hadn't suddenly passed away.
If I hadn't been away from home for so long.
I would've definitely become the family head.
So, from the current head's perspective, he'd want to get rid of me somehow. Who knows when I might overthrow him and take his place.
"Well, that's not my fucking problem~"
The important thing is that bastard sold me off as a breeding stud. Not just to any woman, but to a fucking old witch over hundreds of years old.
In that sense, raiding the family heirloom is a perfectly justified response. That incompetent bastard doesn't even know it exists.
'If you hadn't struck first, I wouldn't have gone this far, brother.'
The library, accessible only to those of the family bloodline. This place holds all the magical tomes the Mars family has accumulated.
I headed deeper to a specific bookshelf. I pushed the bookshelf aside with all my strength.
"Urghhh!"
It's a bookshelf even a grown man couldn't easily move. Using every ounce of strength, it finally budged with a grinding sound, revealing a wall.
"…Goddamn. Such bad taste."
Magic can't be used in the family library.
A barrier protects the magical tomes.
A secret library only accessible to family members.
A bookshelf too heavy to move with pure strength.
These two factors kept this secret hidden for so long.
As I said, Mars is a mage family. Nobles here would hardly bother with physical exercise.
'Unless someone is a weirdo like me.'
I bit my thumb, drawing a bit of blood.
When I smeared it on the wall, magic activated instantly.
Nothing seemed to change at first glance, but when I touched the wall, my hand passed through.
"To think they made a secret space like this. The first head must've been a goddamn genius."
I'd never been this far before. I'd only peeked inside with magic.
Whatever's here is meant only for the family head.
"But at this point, who gives a shit about that."
I'm already losing it, being forced to marry a grandma.
I stepped through the wall.
Unlike the entrance, hidden with all sorts of magic, the inside was a small, plain room.
An empty space.
With just a single notebook sitting there on a small self on the wall.
"This is our family's secret?"
According to history, the first Lord Mars was a commoner. So how a commoner became a mage worthy of a title and territory was a big mystery.
'With this, the secret of the first head, called the greatest mage ever, is in my hands.'
Feeling a rush of nerves, I picked up the notebook.
It read:
[Magic to Easily Fuck GILFs & Long-Lived Species]
"…What the fuck?"
I couldn't help but curse out loud.
Seriously, what the hell?
"Fucking long-lived species? What's this…"
This is the secret magic of a mage family. Hidden so thoroughly it wasn't even passed down to descendants.
But the title of this ultimate notebook is about fucking long-lived species and GILFs?
Was the first head actually a complete lunatic?
"No, wait. Maybe this is a test."
First, I need to verify the truth…!
Steeling my mind, I opened the notebook.
[If you're reading this, you've uncovered the library's secret. Well done. You're worthy of inheriting our family's magic…]
"Skip the useless parts."
Like skimming an erotica for the spicy scenes, I flipped through quickly.
Finally, I found the important part.
[…And so, what I discovered was magic to seduce long-lived women. They usually look down on humans, but with this magic and a good fuck, they're nothing but moaning bitches beneath you. By raising their affection, I learned magic from them. That's why our family's magic is so exceptional.]
"Oh, fuck. Holy shit."
Was this what Pandora felt when she opened the box?
[Afterward, I returned to the kingdom, made a name as a great mage, and was granted a title and territory. All thanks to the power of sex.]
'So, the first head seduced long-lived women to learn magic and built the family on that?'
My head was spinning.
'Long-lived species are at least decades old, most living centuries.'
To think of seducing such grandmas to learn magic.
In a way, isn't that a human triumph?
[For the descendant who find this place, I've written down the magic I used for long-lived females. May it be of use to you.]
"Fuck you."
The system, acquisition method, and effects of the magic were detailed clearly. Ready to learn right away.
"But this is too much."
I thought it'd be the cornerstone of becoming a great mage. But it's magic for seducing long-lived women?
Right before being sold to a grandma, no less.
Is this fate telling me to use this magic?
"No way. That's just not right."
No matter how much I want revenge on the current head.
I can't imagine seducing an old hag.
Does she even have a sex drive?
The first head must've been an extreme optimist.
"…I'll learn it, just in case."
I really don't want to use it.
I don't even plan to.
But you never know with life.
****
The magic was surprisingly systematic, despite its ridiculous effect.
The notebook organized it neatly.
[1. Long-lived species feel stronger pleasure when touched by a mage using this magic.]
[2. If a long-lived species feels sufficient pleasure, the magic analyzes their erogenous zones and preferred play.]
[3. The mage can partially hear the thoughts of a long-lived species feeling pleasure.]
"…The problem is it's all about sex."
If it just raised affection easily, it'd be useful.
But it only activates when you touch or have sex with them.
I admit the effect is overpowered.
Making them feel pleasure just by touching and learning their preferences?
There's no better magic for seducing long-lived species.
Isn't the ultimate affection called fucking affection?
"But to see the effect, I'd have to fuck them first."
Am I crazy enough to touch an old grandma?
Fuck. Life's such a bitch.
'Anyway, I've learned the magic…'
I decided to test it out.
Sarah's the perfect subject for this.
.
.
.
"Hng! Wait, young master! I need to get ready… Haaah…!"
I pounced on Sarah, who was rushing after sleeping in from our sex marathon.
I tried fucking her with the magic, but it didn't activate.
'As expected, it only works on long-lived species.'
The magic itself isn't fake.
I can feel the mana flowing in me and its principles clearly.
'They limited it to long-lived species to amplify the effect. Applying it to all women would destabilize the circuit.'
…It really is useless unless I'm fucking a long-lived species.
"Damn it."
The family's secret magic I went through all this trouble to learn is this crap.
Nothing but shitty things have happened since our parents died.
Meanwhile, the time to head to the witches' territory approached.
Conveniently, a carriage was waiting outside the mansion.
You could feel the urgency to get me out of here.
Didn't want others to see me off? Only the my bastard brother and my sister-in-law showed up.
'…Did he deliberately come alone and keep everyone else away?'
I'd already said goodbye to those close to me in the family.
But to be treated like this on my final departure? It's fucking infuriating.
'I'm sacrificing for the family, after all.'
He's clearly determined to be done with me.
Well, he probably never wants to see me again.
"Take care, young master."
"Thank you, sister-in-law."
My sister-in-law looked at me with affectionate eyes, giving me her blessing.
Goddamn, look at those gorgeous tits and curves.
She has long lucious hazelnut hair reaching down her waist. Her body hugged by a beautiful gown and her ass and tits strain against the dress if they want to jump out of them.
Honestly, she's too good for my bastard brother.
'She was his childhood friend, right?'
That's why they married unusually early for nobles.
She's beautiful enough to catch his eye and make him use his own status to get her. With killer tits and a huge ass to boot.
'If our age gap wasn't so big, I might've fought him for her.'
Since she's my brother's wife, I didn't touch her, even though she's hot. Knowing this would happen, maybe I should've tried.
"Go carefully. Don't even think about running off midway."
"Fuck off. You think I'm a coward like you?"
"You bastard…!"
He can get mad all he wants; he can't do shit to me.
I flipped him off and climbed into the carriage.
The carriage set off soon after.
Toward the witches' territory.
Toward my witch wife.
'Just you wait. I'll definitely come back.'
I'll come back and take back the family and territory our parents left.
And while I'm at it, I'll fuck your wife and daughter too and make you the greatest fuck of the land.