"And we need your help to entering undetected in devil's territory, nya!" Persephone heard the young nekoshou exclaim loudly while hiding behind the infinite deity. The goddess merely smiled at the cute girl, sending her a generous smile before she retreated back to her throne, and lowered herself on it. The goddess of springtime and flowers turned her attention to the god that is so many times powerful than her and her husband.

"And why did you come to us, Naruto. We know that you're powerful enough to just enter the underworld without anyone knowing, so why is our question." Persephone asked Kuroka's mentor who laughed quietly before cutting that off.

"There is no other reason than that of courtesy." Answered Naruto with a hand on Kuroka's shoulder. "Without asking for a blessing from some of the gods that keep an eye about this domain, I put easily Kuroka or anyone that is close to us in danger. Why, because you can easily reveal us in retribution, and that was why we used the Death or Alive Company entrance to gain a Charon on our side."

Hades let out a deep laughter at the short reasoning of the most powerful god in existence, however, it doesn't matter how powerful you are, if you don't show the courtesy for specified Gods, they can easily make your life a hell. Literally. "You are cunning milord. I could not say that any better as you just did, so I'll give you my blessing and a warning."

"A warning, nya!" Kuroka queries in confusing, tilting her head slightly to the right that brought out a squeal from Persephone while Hades groaned at his wife's behavior.

Hades nodded, "Yes, a warning. The underworld is at the moment a very dangerous place for any member of the youkai's faction with the exception of Kuroka's sister who is protected by the Gremory House, however that is just barely. I know that your sister, Hecate had warned you, but I too want to warn you about the consequences of what happens if you rescue her right now." Kuroka hissed quietly from down her throat. Her eyes narrowed dangerously while her tails swayed unrest behind her. "If you rescue young Shirone right now, I can promise that I'll welcome the almost whole nekomata race, however, there is another way to rescue her. If Naruto is successful in retracting the evil pieces from you and place you under a mark of his own, you, Kuroka will be free from Devil's and Youkai's law."

"That's a fair warning Hades, thank you." Naruto inclined his head in thanks. "Perhaps we can meet someday after I've finished Kuroka's training and you can introduce your son and daughter to me." Naruto proposed for a meeting outside of the underworld while guiding his apprentice out of the throne room before he gained an answer. Grasping Kuroka lightly around her waist as a portal opened in front of them at which they stepped through, and before they vanished Naruto's last comment were for the demi-gods children and satyr. "Percy, Annabeth, and Grover, have some fun with your grandfather, I hope to hear some great stories when we meet again, ciao."

"Wh..wha...what do you mean, have fun with our grandfather!" Exclaimed Annabeth in discomfort now that she noticed that the strongest being who could order Hades around to release Percy's mother and the return of the lightning bolt. "Hey! Don't walk away, I, Annabeth Chase in the name of my mother orders you to help us!" Daughter of Athena ordered in a loud, commanding tone with the hope that he would listen to her, however, all that she gained was a bucket of ice cold water fall over her at which Persephone laughed loudly at her unfortunate accident. "Don't run away..." Her voice echoed through the throne room while the portal shut close and they were left with the Lord and Queen of the Underworld. Darkness crept over the floor and up on the walls of the throne room as Hades spread out his darkness power and Annabeth, Percy and Grover slowly turned around to see the King and Queen of the underworld smirk down evilly at them.

"Now that important business are over, why would I let you three intruders alive here in the underworld were the death rules." Hades eerie voice echoed menacingly off the walls of the throne room and a cold, dreadful feeling filled the demi-gods and one lone satyr as the darkness thickened until only the master of the underworld could be seen before he too vanished.


Underworld, Devil's territory...

Two figures stepped out of a black portal. An unnatural wind erupted around them, cloaks billowing before they settled down. A thin layer of dust rose up when their feet touched the ground. "So, this has happened to the underworld after the massive battle between those two fools." Commented Kuroka's sensei dryly while he took everything in. "All that is left are floating platforms of earth, dry pools, and almost death trees... they really don't know how to take care of nature."

"This place... is just as I remember. Everything here radiates somber, oppressive... one word, Hell." Kuroka spoke in a small, somber voice. Her eyes sad while she took everything in, from the bare trees to the dry holes that were once sparkling, crystal clear lagoons. "This place rightfully earns to be called an Underworld, and that is why I still have doubt of leaving here... my little sister, Shirone." She tilted her head up to look at her sensei's face. "Sensei, why can't we take Shirone with us? Please, why?!" Kuroka cried out in a small, broken voice. She felt her sensei's arms wrap around her, holding her tight against him in a protecting way.

"Kuroka," Naruto whispered in a caring voice. "Listen to me, I know that leaving your sister was a difficult decision. Here, in this awful place that brought you only misery, however, I want you to think clearly. I have the powers to take Shirone with us, protecting her from those that want to finish what they started." Here Kuroka nodded eagerly of having her sister with her. "But my friends, Hecate and Hades have seen or felt something that would cast destruction. If I would rescue Shirone, what would happen to your race? The Devils are still in anger and hate of what you have done to protect your younger sister, and they would not soon forget that. Imagine what would happen if I take Shirone with us, would they retaliate and attack the Nekoshou that found shelter under the protective arms of the Yokai faction?" Here Kuroka's eyes widened in fear, images of her race being slaughtered by those rotten Devils. "There would be a bloody fight, Devils would accuse the Youkai faction and they would defend themselves from accusations and we don't know what might happen."

"No! I don't want them to fight. My race, they do not deserve such a future." Kuroka cried out in sadness while she buried her head in the embrace of her sensei. "I..I will train hard, become stronger and then I will take my sister back." She vowed to herself, promising that she would train hard until she can reunite with her again, no matter what Shirone felt for her.

'And that my young apprentice that it is hard to be primordial. Making decisions that could spell the end of a whole race or the happiness of one.' Thought Naruto while comforting his apprentice who cried out hot tears that stained his obi. 'While we have powers that could destroy or create, we must be careful in using them. Unlike most Primordials, I do care about those living here on earth and will try to protect them.' Tilting his head up to see the crimson sky, apprentice and sensei vanished from the floating platform and emerald leaves dwindled down slowly towards the earth. Somewhere else a gust of wind erupted and the pair appeared in front of a massive medieval castle. Glancing down, Naruto nudged her shoulders with his own. "Kuroka-chan, welcome to Ajuka Beelzebub jumble castle. We'll infiltrate this place and steal anything worth while searching for our answer to your problems." Spoke the Primordial with a beat up voice, trying to bring a bit of a sparkle back into his apprentice.

"Nya...! How do you want to enter this place, through the Frontgate?!" Kuroka commented in a high pitched voice, eyes wide in disbelief and her depressive mood for the moment pushed aside. Her eyes widened some more when she noticed the challenging smirk of her sensei.

Naruto nodded at his apprentice, a devilish smirk plastered on his face. "You're correct, we'll use a handy technique or what we called in the past Henge no Jutsu." Performing the tiger hand seal and with a column of white smoke Naruto vanished and on his place stands Sirzechs Lucifer. "Using this by molding our chakra to make a second layer over our body, we can change our body to look like anyone we want. Now my plan, you will masquerade as his little sister... Gremory Rias." Placing his hand on her head, Naruto pushed some chakra into her system and her silk black hair turned a deep crimson color. Now on Kuroka's former place stands Sirzechs' little sister ...Gremory Rias. "Now, stay calm and let me do all the work, okay?"

"Hai!" Kuroka called out while watching her sensei's finger closing the distance between them and the doorbell. A moment later a loud explosion resounded through the castle, black smoke floated out of an open window. Not a second later the doors flew open and a tall young man with light green hair appeared in the entrance. A scowl was clearly seen on his face.

"Sirzech, I hadn't expected you today." The green haired satan, Ajuka spoke in an annoyed voice when his eyes rested on his fellow satan. "Did I not told you that Rias' get her items tomorrow?" Eyes narrowed when his red haired friend sweated slightly under his sharp glare. "Or is this an excuse for you to avoid some paperwork and your wife, Grayfia. Well, which one is it?"

Sirzech brought his hand to the back of his head, rubbing his hair nervously. "Ha... Ha.. You got me!" Confessed the red satan with a weak laugh, when suddenly in a blink of an eye the red satan have his arms wrapped around the green haired satan's legs. "But please don't tell them I'm here! My sweet, cute innocent Rias would not hand me out to them...!"

"You bribed her by using my invention to keep her lips sealed..." Ajuka dryly stated while glancing to the heiress of the Gremory House. Lowering his head in defeat and letting out a deep sigh, Ajuka pushed his friend away from him, releasing himself from his firm grip. "Alright Sirzech, I'll let you stay here for an hour maximum and not a second longer as am I not looking forward to your wife's wrath. Now cmon then, I'll show you what Rias-chan get for wonderful items."

"Thank you, brother!" Exclaimed the red haired satan overjoyed and with another blink of an eye, Sirzech appeared next to his little sister with his hand resting on her shoulder. "You will not regret it, now let enter the wonderful world of the Green Satan, Rias!" And with a skip in his step, the two impersonated figures of Sirzech and Rias entered one of the most dangerous places. Naruto and Kuroka followed the green satan in his footsteps, and Kuroka plays her role as Sirzechs curious, little sister brilliantly. She pointed out the old inventions of the first devil's evil pieces that are placed on stands. Others are of images, portraits of his heroic deeds in the civil war of the underworld while others are with him and the other satans. 'Glad that Kuroka points out the other Satans, if I ever meet them then I would not make an error of insulting them or if we clash in a fight, then I know at least some of their abilities.' Naruto thought while taking in their faces, and for a moment his eyes lingered longer on the out of proportion breasts of the only female Satan.

"Ahem..." Sirzech was brought out of his staring at the wonderful breasts of the satan Serafall Leviathan when Ajuka cleared his throat to get his friend's attention. "Serafall's breasts are fascinating, aren't they? However, if you stare any longer at them I am afraid that I need to report this to your wife." Warned the green Satan with a stern gaze at his friend. "Now come along, and I will explain what so special is about these items."

A surprised look appeared on the red haired satan, however that was the mask as inwardly Naruto frowned at what this man means. This man is without a doubt a genius, however, his plans to bring his people back in huge amount is a danger to the natural order by changing them into devils that will bring more negative energy into the world. "As you know, our kind have dwindled rapidly since the great war between the three factions of the Pure and Impure Angels of God and our own. After our own civil war, I've started to research a way to double our kind three-folded. And I succeeded when I created the Evil Pieces that would transform every living being into a Devil while they retain their own nature aspect." Sirzech turned his attention to him when he started his story and explanation of how the Evil Pieces came to be. "And like you know, it was a huge success!" For a moment the two satans were quite, each in their own thoughts before Ajuka continued. "Perhaps I was too successful Sirzech. My thoughts started with doubts with the Nekoshou accidents when the stray devil Kuroka murdered her master in an act of power. My theory is that her minuscule chakra source gained too early a boost and with her still being a cat creature, and in combination with that of a devil, she turned out quite power hungry."

"And what did you come up with to repel these... threats?" Questioned Sirzech in a colder voice when he heard this Satan speak like that about his apprentice. The pair moved now a bit slower through the halls, and Sirzech gazed coldly at his friend. "Don't delay, I, as a fellow satan want to know what you did to these items!"

Ajuka eyes widened when first his friend spoke coolly to him when he spoke about the stray devil, and now his demands of knowing about his newest pieces. 'Perhaps the outcome of rescuing the sister of the stray devil didn't go well and now the pressure is too much for him.' Formulated the green haired devil while starting to study his friend for any sign of tiredness. He noticed the tiredness, but also something else, however, he let it slide for now in favor of explaining his newest, improved Devil's Evil Pieces. "After a long time of testing and tinkering, I found out how to improve my set. Actually it was a fortunate accident, however, the results are amazing. These pieces now have a purple radiating, the sign that they are mutated. These pieces can turn any creature into a devil completely with a few compounds from their previous life as long if they are below the power of the King."

"If I understand this correctly if I gift the young nekoshou that is now in my household this mutated piece, she will turn completely into a devil with no nekoshou treats except for her chakra. Following that, if she is not stronger than the person that she wants to recruit." Here Ajuka nodded at his friend who summed his explanation perfectly well together, "However I guess here a but, there is somewhere a clause, something to secure that something like what happened with the stray devil will not repeat itself, am I right?" Sirzech told his friend of what he had gathered so far and they arrived at his workplace, or precisely they are standing in front of a box that radiated quite some power.

"Yes, you got that right. I've put a clause in these items, if a devil made member will revolt, the king can order to take his or her devil's powers back, and by doing this the person would die as nothing from his former life exists. No human, nekoshou or any other being's cells are left behind." Confessed the satan while picking up the box and turned to his friend. "I want to say that this is possibly my best work and that this might be the answer for Rias to give her a chance to avoid her contract with the Phenex House."

Sirzech accepted the box with the chess pieces. A small, cruel smile appeared on his face when he came in possession of the box. "Thank you, Ajuka, and sorry to deceive you but Sirzech is not here... Nehan Shoja no Jutsu!"

Ajuka's eyes widened in shock when his friend's eyes turned purple with nine rings around his pupil and a harsh glare appeared on his face. Automatic his body tried to make some distance between this imposter and himself, alas it seemed it was too late when Ajuka felt his body to lose its strength and gained some difficulty to stay awake. In the corner of his eyes, he noticed that white feathers floated slowly down towards the floor. "W..Wh...Who are …..you?!" The satan managed to yell out at the end before his consciousness blackened out.

"Someone you don't need to know nor to remember." Whispered Sirzech while using another Jutsu to remove the knowledge about the newest invention and his use of his techniques. Lowering the unconscious satan to the floor, Sirzech created seal-less a shadow clone that would search through the papers quickly before destroying the workplace of this devil. While his clone was working, Sirzech moved towards the exit where he noticed his apprentice standing, waiting for him. "I changed my mind Kuroka, we'll have a new mission, a rescue mission."

The dark haired nekoshou's eyes widened in happiness, tears gathered together at the corner of her eyes while she surged towards her sensei. Her whole body trembled, and all she could do was smile while she hugged the life out of her sensei. "Sensei! Thank you, I can't express how much this mean to me nyaa! Shirone, here I come, and I promise I will never let you go without a fight, nya!"