Rias Gremory, Heiress of one of seventy-two pillar houses of the underworld moved her dark, black bat wings through the air. Keeping her body afloat in the air and her beautiful crimson hair danced freely in the wind that gently caressed her face. "Nii-san, when do we arrive at Green Satan's castle 'cause I cannot wait for any second longer for my peerage pieces." Shouted the Heiress in an exasperated way, her cheeks tainted pink and a frown on her face, something her brother love about her. "With them in my hands, I will finally get my first two pieces. My best friend, Himeji Akeno and another is a rare breed of Nekomata. "

Next to her, using his six pair of bat wings is her brother Sirzech Lucifer who former belonged to the House of Gremory before he took the name and title of Lucifer. Like his sister, Sirzech has long flowing crimson hair and is counted to one of the most desired and famous devils of the underworld. The satan let out a loud, amused laughter rang through the air when Sirzech sees the cute expression on his sister's face. "Ooooh Rias-tan, you look so adorable with that face! Let your brother hug you!" Cried the Satan in an unfashionable way of someone of his standing. With his arms spread, Sirzech rushed towards the younger devil, tears pouring out of the corner of his eyes when Sirzech managed to wrap his arms around her still, frozen form. Rubbing his cheek on that of Rias who desperately tried to escape her older brother's monstrous hug and her ears are assaulted by his voice. "I love you so much Rias-tan! Today is the day you take your first step into growing up..!" Satan Sirzech Lucifer's voice rang far and wide through the underworld, reaching a certain couple that flew towards the mansion of one of the seventy-two pillar of the underworld. They are now the most wanted persons of the underworld, however, the underworld hasn't yet gained such a notice and with that luck on their side, Naruto and Kuroka managed to fly unhindered towards their target.

"Nyaaa, Naruto-sensei, that voice is from Shirone caretaker, Sirzech Lucifer." Kuroka shared her thought about the voice she heard in the distance. The dark haired Nekoshou knew to who belonged that voice, and him in the nearby facility is not good for their situation. "He's a powerful devil, a satan-class. We need to watch out for him, sensei nya."

Naruto reached out to her, caressing the crown of her head. His eyes curled up in the trademark eye smiles of someone that was once assigned to be a mentor to him. "Don't worry my little Neko-chan. I do not want anything bad to happen to you as long I am alive." Reassured Kuroka's sensei his young protégé. "Set that foolish Satan out of your head and let focus us on your sister, okay?"

"B..but. He is a satan-class..." Kuroka murmured in a small voice. Fear firmly planted into her conscious when she once watched how the most famous satan defeated a group of devils that thought to roar they ugly head in the underworld. Unexpectantly a warm arm wrapped around her upper torso and brought her in a warm embrace. "...Nyaaan Sensei?" Whispered the Nekoshou with growing eyes, her cheeks felt suddenly warm.

The warm soothing voice of her sensei suddenly teased her ears while she was brought deeper into his embrace, her chest flushed against his. "Did I not say that you don't need to worry about him or anyone else that might disrupt in your union of your sister. But if it calms you down if I say that anyone here in the underworld would not even touch or scratch me, do you promise me not to worry again, Kuroka-chan?"

"Nyaaan – promise sensei?" Kuroka said, her voice gathered strength when the light in her sensei's eyes burned with determination. She felt her chest rise and fall at the rhythm of his calm heartbeat, and she too calmed down while they moved through the underworld. They flew past asteroids, dying trees that appeared on their path and Kuroka could feel the negative feelings of nature. Her neck hair froze at the feeling, standing up straight and she felt as if she would drown in a sea of negative feelings. Before the feeling could seep deeper into her heart, a calm but firm hand caressed the bangs of her hair gently, disrupting the negative feelings. She sends him a grateful smile when the negative aura and feelings were filtered out of her system.

"Kuroka-chan – keep your thoughts calm and let it flow through you." Her sensei's calm, baritone voice caressed her ears. "What you just felt a moment ago are the dying trees and this nature's rage of what they did to her." Explained the sage with a thoughtful frown on his face. "She feels alone, abandoned and hurt by what they did to her body, and when she felt us – she tried to reach out to us in the only way she knows… namely with rage, revenge."

"Who is her?" The Nekoshou asked curiously, she turned her head sharply to her left when a new burst of new negative energy erupted out of the floating islands of earth.

"A being that has many names that each carries the same burden. The Greek pantheon calls her Gaea, with those of Rome pantheon, they call her Terra, and the Norse pantheon calls her Jorth, goddess of the Earth. Those are the few names she uses with her being visiting one of them." Kuroka listened to her sensei who is once more in lecture mode. "The Earth is only personified by a single goddess, her powers so great that if there were more she would self-destruct herself. When there are more than one meetings with different pantheon, Earth's personified goddess would split herself up into the images of those that summoned her. If she really wants to wipe out those that call themselves rulers – they would be wiped out in a blink of an eye." Amber-golden eyes increased in disbelieve at the discovery of the Earth herself. "It is true Kuroka-chan, she let those gods that rule the surface just play like impudent little children until she deemed enough. And that is why, we, your race, including the youkai exist to terminate her current rage to the world." Explained her sensei, a breeze of wind caressed their faces when they descended. "Your kinds power comes from the very soil of Gaea the Earth mother, and she always helped your kind in their need of help – lending her powers to you in the form of senjutsu. Now… it is your kind turn to help her and this all start with you with my guidance and teachings."

"I do not understand how we can help such a powerful goddess, especially when you said that I must do it. At the moment my own kind hates me, I caused almost the end of my own kind!" Kuroka said with a heavy voice when memories of the Devil's attacks on her kind returned. Tears gathered anew at the corner of her eyes, only for them to be wiped away by her sensei.

"You don't need to understand immediately, or else my job is easily done. When we have retrieved your sister from the hands of the Devils, literally, we will first clear your name with the youkai faction and reveal your place at my side. After that, we, Shirone, you and I will start your training in becoming a sage to help Mother nature." Sensei said to his student, wiping away the last stray tear from her face before they touched the ground. "Now dry your tears and call upon your impersonated form of the sister of the Maou. We will infiltrate their own estate to get your sister, once Shirone is in our presence, safe and well, I will teleport us out of the Underworld." Explained the sage his plans of rescue to the young Nekoshou.

Her long beautiful silky black hair turned a bright crimson, bright amber-golden eyes turned a teal-green and her form shrunk down until she was eight years old girl. Next were her clothes, turning in a cute red dress that looks good together with her hair. "Nya. will we really fool them like this?" Murmured Kuroka disbelieving when she glanced down her body, she frowned when she noticed the lack of her breasts at which she is very proud of. "Unlike that green haired bastard who lives alone, Gremory Mansion is filled with servants and members of the House who will recognize if we do something out of the norm." She said with a bit of worry in her voice, Kuroka does not want to leave her sister for the second time.

"Trust me Kuroka-chan, everything will be fine. Now keep your chin high up and let me do the talking if we come across the members of House Gremory." The now Sirzech looks alike said, his hand resting comfortably on her shoulder. His large hands pushed the door open and they entered the Mansion – and the two impersonated intruders are immediately welcomed by a troop of Maidens.

"Welcome home Master Lucifer and Heiress Gremory! We did not foresee your return so quickly, did you perhaps forgot something – perhaps your wife must be informed." One the Maidens from the troop said to Sirzech. The mentioned Devil blanched at the idea that his wife would come to meet him, a huge sweatdrop rolled down the side of his face and with a quick, wild gesture of his hands he waved away the concerns of his Maidens while letting out a joyful laugh.

Calming down his nerves, Sirzech addressed the Maidens. "Hello, girls, sorry to trouble you this early in the morning and from not so long ago when we left. On our way to my friend we intercepted a message that someone infiltrated the Underworld with the intention of kidnapping the last Nekoshou." Explained the crimson Satan with a worried expression of what might happen to the poor child. "Imagine what would happen if they managed to kidnap her and my sister won't get her peerage member!" Here the Maiden turned all their head to gaze like one at the younger Devil who seems to almost break out of tears. "You can understand that this news makes me worried, especially for my cute Ria-tan! Or what it would do to me..." Whispered the Devil in a low voice while Rias put in some more drama, she even started to tear up.

The Maidens of House Gremory let out a deep sigh like one and they waited until the Maou is done with his childish outburst and his unhealthy obsession with his sister. Not wanting to stay here listening to how the Sis-con would boast about the Heiress of House Gremory – one of the Maiden stepped forward bravely and made a quick excuse. "Milord, my apologies to interrupt your wonder speech about how wonderful Rias-sama is, but if you don't go quickly to retrieve that nasty, dirty Nekoshou from the dungeons. I fear that those who want to take away your sister future peerage member will get their hands on her."

Rias tear vanished like snow in the sun when she heard that Maiden speaks like that about her sister. She raged and her illusion wavered, yet the Maidens behaved like normal to them as if that didn't happen. The Nekoshou who fools these Maidens around glanced to her sensei who just kept talking before they moved on towards the dungeons. With quick steps, she followed him until they were out of hearing range. "Nya Sensei, how come that they did not react when my illusion wavered?"

"I did cover ourselves in an illusion before we entered the Mansion. This mission I deemed important for you because of your sister, and I would not forgive myself if we failed in this. Also, I wanted to see how well you did because I think this is important to learn to keep your emotion under control when you face something like what happened a moment ago. The wavering of your illusion." Naruto said to his apprentice while he led her through a door and down the stairs. "With your emotion under control and a good knowledge about illusions you can get most answers for your questions – an example: How did I find the dungeons so quick without knowing the way, Kuroka?"

"Illusions Nya?" She guesses shyly, her cheeks dusting pink when she thought about her answer. Somehow she felt that it was a silly guess. With hopeful eyes Kuroka glanced up to her sensei, seeing a smirk that told her in volumes how proudful he felt for her. "N..Nyaa... I guessed it right, sensei?"

"You did!" Exclaimed Kuroka's sensei with a bright smile. Leading her through the maze of tunnels she could see that her sensei somehow knew which way they needed to take, and seeing him here so full of confidence – Kuroka vowed to become someone like him … and perhaps she can make him hers, no screw that … her sensei is hers! "...lling your emotions is also a part of your lessons. If you're too enraged by the smallest of things, you can lose a battle, someone close or worst your own life. And..."

"Shirone!" The sudden cry of his apprentice cut off his explanation and the soft breeze that was created by Kuroka who rushed past him to the cell door of her sister. Naruto let out a soft sigh now that all her attention is on her sister and a cold light entered his eyes. Placing his index finger against the cold, rough stone walls of the dungeons that told him almost what horrifying things happened here … letting out a low hiss of anger, a seal appeared under his index that pulsed with chakra before it disappeared. "This will deal with them when they arrive here." Commented Kuroka's sensei before he joined his apprentice in the cell to meet her sister.

"Shirone what have they done to you!" The black haired nekoshou cried out in anguish. Kuroka has reasons of feeling horrible when she found her sister in a horrible state. Her sister's beautiful snow white hair is sticking to all sides, dirt and other smelly stuff are clearly shown. Shirone's face which held tears track and much to her horror she was blindfolded and chained to a chair. "They will pay for what they had done to you, I promise you that Shirone!" She lifted her hand, spreading her fingers and her nails extended to claws that she used to cut her sister free. "I can't say how sorry I am! That dirty liar told me you would be safe and well cared … well, not." She rambled out and she managed to free her sister's wrists before moving to the chain around her neck.

"O..Onee-san?" Kuroka shed more tears when she heard the quivering in her little sister's voice. She won't want to think about what those monsters did to her sister. The black Nekoshou seethed at what they had done to her, yet she was glad they did nothing intimidate with her, but that state the question with that sticky stuff is. "I..is tha—at re..really you? … No! It is one of their tricks! They said that you murdered all the others – Your own King who take care of us... why did you do it?!" Kuroka was for a moment stunned at what left her sister's mouth. 'These Devils – what did they do to you? I swear... they will pay for this Nya!'

"It is truly me Shirone, did I not say that I would come back for you." The black Nekoshou said. Her fingers removed the blindfolds from her sister's face and the same shades of her own eyes stared back at her, however, they are troubled as if she had difficult to focus – drugged. "And I won't leave without you!"

"We need to go, my apprentice – those bastards are making their wa—" Her sensei's voice was cut short when a heavy menacing aura of power manifested in the dungeons. She could feel her sister, Shirone shiver in fear, her head moving frantically from left to right while she wailed out in a high pitched scream. "The Maou is here... if you want to get your sister with you – we need to move now!"

Kuroka turned around, she could see the real Maou move quickly to their spot, an orb of the power of destruction in his hands and a mask of disgust on his face. "Right, I won't leave without her … ready we are!" She shouted, her eyes widened when she sees Sirzech spread his wings, which were a lot of them as he launched his Devil's powers at them … small black orbs rushed through the dungeons tunnel towards them … Kaboom!

Sirzech Lucifer, Maou of the Devils and Satan class arrived with his sister at his friend's fortress. The Satan could not help to giggle at the thought that his sister can finally start her own peerage. After all … his sister have already two peerage members waiting for her in the Mansion, one of them a dear friend of his cute Rias-tan ...and the other need a bit more convincing to join them. The Nekoshou still thinks that her sister will come for her, and that is not something he wants her to remember. First of all, Sirzech arrived here to get two items, one is some kind of gel that will help him in brainwashing the child because a species of her kind are rare, and the others are of course his sister's new pieces! "Oooh Rias-tan, what I feel right now is my excitement for you! I can't believe that my little sister has grown so much." Sirzech squealed and quickly rapped his knuckles against the heavy gates of the Fortress of the mad scientist. There was no sound nor the faint aura of his friend, frowning Sirzech murmured under his breath. "That lazy bastard! How dare Ajuka-san to let my sister wait for her first Devil Pieces... huh?"

"Nii-san...! When will that lazy Devil let us in? I want my Devil's pieces NOW!" The loud cry of his beloved sister deafened his ears. Fearfully the Great Satan turned around to look at his sister before suddenly sink to his knees and hugged Rias while crying out loud. "Stop this baka! Open the gate so I can get my first members the sooner I get my hands on these pieces.' She ordered the mighty Lucifer who followed them with the magic of Destruction whirled around his hand before slammed them against the gates … only for the illusion to break in hundreds of pieces and now the ruined states of the Fortress was shown to Sirzech. "W..what ha..happened here?!"

Sirzech childish character vanished like snow that lay under the warm summer sun, and now a firm, hard face replaced the former. Cold eyes gazed around him before his arms sneaked around the form of his sister, lifting her up and held her tightly against his chest. "Something I want to know too, yet the only answer is with my friend Ajuka." Replied the Satan leaped he through the ruined fortress in search for his friend. Everywhere that his eyes landed on was ruined, paintings were burning down and cast a black smokescreen, in the distance explosions could be heard until those sounds were overwhelmed by a roar that shook the fortress to its foundation. "SIRZECH! I will get you for this!"