Disclaimer: Naruto (Konoha Gakuen version) x Seven MORTAL Sins - I own neither
Story Start!

Surgery failed.

Praying failed.

Uzumaki Kushina could only feel hopeless as she looked at another negative pregnancy test, and this test added up to her 100th failed test. She had been told by doctors that she was physically unable to have a child, but she kept trying. She and her husband spent more money than a normal woman would be willing to spend, on several surgeries so that she could be with a child in her body.

She tried to pray to the dieties of her nation, and she got nothing.

So she tried to pray to the gods of other nations, but in the end that failed as well. She wasn't even able to adopt a child, thanks to her criminal record that she gained when she was the leader of her own biker gang. She had tried several times to adopt a child, but she had been turned away every single time the second they looked into her past. She failed background checks left and right, so she cursed the nation that she lived in. She cursed other nations as well, because she hated them for denying her the right to adopt the children of their nations.

A child.

A complete family was all that she wanted from her life, and she would waste every single cent of her family fortune to make it happen.

"Kushina... this seems... extreme." Namikaze Minato, her husband (she was part of a clan, so she could not take the last name of a clanless man) spoke to her gently as looked at the goat that she asked him to get for her. The simple fact of the matter was that they had been trying for over 10 years now to get pregnant, and eventually she would no longer be at the age where she could have a child. "... Listen... I can divorce you, then remarry and adopt a child, then divorce her and remarry you."

Kushina glared at him.

"No... because the simple fact is that this legal system favors mothers over fathers, the odds you will get the child is not great... and the other mother will have claim. I want my child to be my child... not some other woman's child." Kushina was fine with adoption, but she didn't want the child to have two mothers. She couldn't bare the thought of the child telling her that he preferred the other mother over her.

It would break her heart.

She had never regretted the stupid choices she made when she was in a gang in her life. The injuries she had gotten had caused her problems, and her reputation and crimes she committed had ruined her happiness later in her life. If she knew what she did now, she would have never started that damn gang.

She slit the goats throat.

The blood spilled all over the floor, the floor that was stained with a demonic looking summoning circle. Kushina had spent a fortune getting a book that was rumored to have the ability to summons demons. Neither of them believed it would work, but Minato winced when he saw the life leave the goat. He mostly did this to satisfy Kushina's desires, so that she could realize it was hopeless, that no demon would come to their call either.

A woman showed up sitting with her legs open and feet touching.

Flaming red hair and purple eyes were noticeable, but she wore little clothing. She had her arms and legs armored in red, and she wore a red cape, but other than that, all she had was an ornate bikini to cover her private bits.

"Mortals who summoned me, know that you summoned Satan, the Demon Lord of Wrath."

'Holy shit.' Minato thought with a face he managed to keep calm. He looked at Kushina, who looked at the demon lord that they had summoned. The woman was beautiful, but she appeared wild and untamed as well. The best he could describe her was dangerous to the very core, which included the horns that pointed up on her head, and the battle axe that was behind her. She looked like she was good at slaughtering people.

Kushina stared at the woman for a moment, before her eyes hardened.

"... I want to give birth to a child... but I don't have the ability. I've tried surgery, and failed at adoption... my wish is for a child. Demon Lord of Wrath... I will give you my very soul for this." Kushina stated, and the lord of wrath just looked at her.

She then looked at Minato.

"... I bet you two would make... a rather cute child, and your red hair... I quite like it. All you want is a child then... you wish to hold your own baby in your arms?" Satan herself looked at the woman who had summoned her. Minato grabbed Kushina by the arm and pulled her back, realizing that Kushina was actually going to do it.

She was going to make a deal with a demon.

"Kushina, you should think about this... this is a bad idea."

"It's fine, I don't want her soul... or even your soul. I'll do it... I'll allow you to get pregnant... and for my price... it won't be your souls. I just want some years off of your lifespan is all... that is all." Satan spoke with a grin as she stared into the hungry eyes of the woman who wished for a child.

"How many."

"Depends on how cute your child is... blond hair, blue eyes... or maybe red hair and blue eyes... or maybe even blond hair with..." Satan stopped herself as she looked at Kushina's face. "... yes... you have a nice face too... both of you do. Of course... your face reminds me a lot of mine... and your red hair is so nice." Satan complimented Kushina as she looked at the woman, who had rather gentle facial features.

Kushina was a little put off.

Satan just smiled.

Kushina yelped and started to grab her belly, her stomach glowed brightly as red energy connected her stomach and Satan's stomach together. Kushina's belly opened up and blood started to float out of her stomach, with an organ leaving her body. Satan's belly also opened up, and the same organ left her body and went into Kushina's body. Satan stood up as both of their bellies finished healing, and she grinned.

"What... did you do to her."

"I gave her my womb, and my blood. If her womb is infertile, then she may borrow my womb, and with my blood to go with it, her child will be strong and survive the birth... but your pregnancy will be unlike other women... it will be far more painful... your pregnancy will last 10 months, not 9... and no amount of medicine will work on the pain you will feel." Satan told her the facts of how she was not going to enjoy what was to come. It was just part of the magic, it was not something that she cared to leave out, but she didn't feel it would be fair to not warn them. "... and you." She turned her head to Minato.

She smiled at him, and he gave her an awkward smile.

There was a tense air.

"Yes?" Minato finally asked.

"The deal is done... and just remember, the number of years I take... will depend on how cute I think that child is... see you later."

-11 Months Later-

Carnage.

Dead bodies everywhere, and a crying child with a bloodied face in the middle of it all, on top of the body of his own dead mother, who had protected him with her life. Minato was barely hanging on as he looked at the massive car pile up that he had been a part of, and he looked down to see his lower body had been crushed underneath a truck, with blood leaking out from under it.

Yet he felt little pain.

He heard the sound of heels walking towards them, and though his vision was hazy, he could make out what appeared to be a familiar figure.

"Uzumaki Kushina and Namikaze Minato... I have judged your child to be... absolutely adorable.. and for that I will taken all of your remaining years." Satan spoke as she walked towards them. She cut her belly open and Kushina's womb flew out of it, and her own womb flew out of Kushina and returned back to her body where it belonged.

"You said... you said it depended on how... cute..."

"Yes, the cuter your child, the more years I would shorten your life by. Yes... I would say your child, but it was my womb that birthed him... so I guess he is partially mine... ah... there it is." Satan looked at the bloodied face of the child, and she could see his emotions were running high. She could feel her blood in him get riled up by his emotions. His eyes had transformed from the bright blue they had been, to a blood red that looked like they came straight from hell itself, with pupils that could scare the life out of anyone.

Her purple eyes changed to red to match them.

She gently wiped the blood from his face.

Whisker mark shaped scars, three of them lined each of his cheeks, giving him the face of a small animal. Satan smiled happily when she saw that his scars only made him all the more fitting for what she wanted.

"You... you demon."

"I am Satan, the Demon Lord of Wrath... as I said, I will not take your souls. I will allow them to go to Heaven, if that is where they should go... maybe they will go to Hell anyway... I don't care. All I know is that my son is just adorable."

"He's my son! He's Kushina's son! He isn't your child!"

Satan smiled at him.

"His parents are dead and dying... he has no family... you were an orphan, and this woman was the last of her family line. He will want power... he will be filled with anger... and he will gain inhuman strength. He has the blood of a Demon Lord... I can't wait until he's ripe." Satan licked her lips as she picked the newborn up and placed him in a safe location, away from everything that would hurt him.

"You planned this... you were going to kill us no matter what!"

"Of course not... if your child had been ugly, I wouldn't have killed you. I would have taken my womb back, and killed you 1 year before you were destined to die. Look at his little fox face... these crystal blue eyes... and that tiny tuff of golden hair... these are the looks of a cutie. Should you really spent your last moments talking to me?" Satan asked Minato as she swung her axe around.

"You won't take him! You won't take Naruto!"

"See! He even has a cute name... Naruto... the shortened version of Narutomaki... the cutest part of ramen. He even kept her last name... so his last name has a spiral in it... just like Narutomakis do... you have good naming sense... and for that I will give you a merciful death." Satan spoke as she raised her axe above her head and stared down at him. "Don't blame me for this, blame every bad choice in your life that led you to me!"

She swung her battle axe.

Chapter End!
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