Kuroka.

"<Crush Magic>?" Rias's and Akeno's tilted a little to the side, showing their bewilderment. Leaving Akeno, who had no knowledge of magic, it was the first time for Rias to hear such magic.

Nodding at their puzzled expression, Wang Lei explained, "Indeed, while <Destruction Magic> of Bael Clan let its user to 'erase' something if mastered to peak, <Crush Magic> lets its user destroy everything or anything they touch to a molecular level. It let its user destroy the bonding between an atom and destroys them."

Using his finger, Wang Lei tapped on the rock beside him. White cracks formed on it before the rock turned to dust, scattering away with the wind.

Rias, Akeno, and Kuro looked with wide eyes as to how the rock turned to dust with just a gentle tap of his. Especially Rias, as she could tell that <Crush Magic> was almost the same as <Destruction Magic>, but at the same time, it was not.

"What you saw is what you would be able to do if you master it completely." Seeing as they were eager to learn more, Wang Lei smiled and spoke, "But this magic is quite hard to control, even harder than <Destruction Magic> as a slight mistake can turn everything around you into cubes or, worse, into dust. That's why one requires high control over their magic to learn it."

Rias and Akeno gulped, hearing that their mistake can turn everything around them, including humans, into cubes or dust. Just as Wang Lei said, it was powerful magic, but one needed great control over one's magical power, demonic power in their case. There was a reason why Gildarts would not stay in the guild that much as he could not control his magic completely. That's why, whenever he returned, the whole Magnolia would go into lockdown and make a way for him to enter.

"So, to learn this magic, you girls will learn how to control your demonic powers first."

Rias and Akeno nodded seriously. They would need, at least, High-Class devil control or even Ultimate-Class to perfectly master the <Crush Magic>.

Nodding at their serious behavior, Wang Lei nodded. He opened his palm, and a balloon appeared in his hand with water in it.

Akeno and Rias were confused, same with Kuro, who was also interested in learning <Crush Magic>.

Seeing their perplexed expression, Wang Lei grinned, "We will use this water balloon as the first step of your training. All you need to do is to use your demonic energy to burst this ballon. Like this," The balloon in his hand started to deform with different protruding at different angles before it burst open.

Rias smirked, "Is that all? Isn't this quite easy?" her arrogant voice resounds in the forest, making Wang Lei raise his brow in amusement.

"Heh! They why don't you give it a try, little Rias. If you can do it, I will complete one of your wishes. From reincarnating someone to making you the strongest being in this whole universe...below me though as it is impossible to do that." Wang Lei spoke with an amusing tone.

"But if you lose, you will have to do one thing about my choice."

"Good! Give it to me!" Rias said with a smirking on her face. She did not believe that she would not be able to do it.

"Here." Wang Lei throws a water balloon towards her that she caught.

Everyone looked at her as she placing the balloon in her palm and tried to use her energy to burst the balloon. But she realized that it was harder than she thought. If she used her <Destruction Magic>, then it was quite easy for her to do, not with only her demonic power.

"Emmmm~!!" With her cheeks swelled, Rias made a cute voice as she tried hard to imagine her energy traveling inside the balloon and destroying it.

'Hm, she looks cute. It's not bad.' Wang Lei nodded as he sees her trying her best to burst the balloon.

"Phuaaa~..., I cannot do it..." In the end, all her breath released as her shoulders slumped down.

"Hehehe~, I hope you are ready to do one thing of my choice~." Wang Lei smirked, looking at her.

A shiver ran down her spine, protecting her body with her hands, Rias shouted, "Nothing to do with my body!"

Shrugging his shoulders, Wang Lei replied, "Who knows? Anyway, here is the pile of Balloons. Try as much as you like, but complete it within a week."

The silver fox waved his hand, creating a pile of water balloons.

Rias and Akeno nodded before going to the balloons and started to practice.

Walking below a tree, Wang Lei sat and looked above him, "Come down here, Kuro."

JUMP

Hearing him, Kuro jumped from the branch and landed on his lap. She looked at him with a confused expression.

Tenderly caressing her furr, Wang Lei said gently, "Will you not show master how you look like?"

Kuro was caught off-guard by his question. She looked at Wang Lei before a bright light covered her body. A moment later, Wang Lei was honored to see her real body.

She had long black hair with split bangs, hazel-gold eyes with cat-like pupils, and well developed voluptuous figure.

Her attire consists of a black kimono, a yellow obi, a set of golden beads, and an ornately detailed headband. The kimono featured a red interior and was open at her shoulders, giving a view of her large breast.

'She is more developed than I thought, almost like Suzaku.' Wang Lei thought. At this time, she should be 14-15 years old and already had such a body.

"Master, nya~" Her jolly voice surprised both Rias and Akeno as she jumped into Wang Lei's chest, snuggling into it.

"Master's body nya~," Kuro said as she rubs her face with Wang Lei's chest.

"There there," The young fox gently pats her head as his eyes landed on her tails, which were moving right and left with happiness.

"Who is she?" Akeno asked as her eyes landed on Kuro inside Wang Lei's arm. Her eyes seem to be quite serious as she looked at her.

"I am master's cat nya~!" Kuro said, adjusting her position in Wang Lei's lap, hugging him.

"His cat?" Rias' brows twitched, hearing her.

"That's right nya~,"

Touching her ears and tails, Wang Lei nodded, "She is indeed my cat. Did you guys did not know that she was Youkai? Anyways, you should go back to what you are doing."

Rias and Akeno nodded reluctantly before resuming their training. Rias thought that she was missing something, but she ignored it.

Wang Lei played with her ears for a while, making the feline girl smile happily.

"So? Care to explain your master about what happened to you?" Wang Lei asked. Although he knew the story, he still wanted to hear it from her mouth.

Sadness covered her face but was replaced when Wang Lei hugged her soft body while gently caressing her head, "If you do not want to tell, then it is okay. Master will not force you." Gently whispering in her ears, Wang Lei reassured her.

Resting her head on Wang Lei's chest, feeling his heartbeat that seems to calm her down, Kuro started to narrate her story of what happened to her and her sister -- Koneko. How they were born of Nekoshou called Fujima and a human researcher. After the death of their parents, they were taken in by a Devil from the branch family of House of Neberius, and she was reincarnated as the Devil's Bishop using up two Evil Pieces.

While serving her master, she became extremely talented in Senjutsu and Youjutsu, and her magical power as a Bishop became so great that she surpassed her own master in terms of magical power alone. After finding out that her master was going to experiment on her sister, she killed her master, resulting in others believing that she was drowned in her own power and killed her master. Due to it, she was declared stray and her sister was about to be executed but was saved by Maou Sirzech, who took her sister in and promised to protect her.

After finishing her story, Kuro was sad, but Wang Lei's gentle patting helped her.

"...Do you want to take your revenge on the House of Neberius?" He was angry, not only for her but because he is the forefather of Youkai, killing them was the same as killing his children. It was salvation for the world that his current strength was nowhere near his peak, or his anger was enough to change the very atmosphere of the whole world.

Feeling the anger in her voice, Kuroka felt warm inside. After the death of her parents, except her sister, she cared for none. But after spending barely three days with Wang Lei, Kuroka felt as she was back to her family. She felt safe close to him. She knew it was something to do with his bloodline of Ten-Tailed.

"I can't. I need to protect Shirone." Even though she did want to revenge, she still had her sister to think of.

Nodding, Wang Lei said, "Then it is decided."

Standing up, he hugged her waist, making her breast squeezed on his chest -- Wang Lei looked at the training duo of little girls and said, "I will be going somewhere; you girls keep on practicing."

Rias and Akeno were confused, but they nodded nevertheless.

Wang Lei raised his hand as natural energy started to gather at his hands at a fast pace; soon, it started to deform the space around them.

SLASH

He slashed in front of him, tearing the space and making a wormhole. Kuro was surprised by his use of natural energy with such precision as if it was part of his body. Of course, she did not know that he was a user of Primordial Energy and every other energy came naturally to him because of that.

"Let's go!" Wang Lei did not wait for her reply and walked into the space hole.

Both of them felt a sudden suction on their bodies as they entered the ripped space, traveling at a tremendously fast rate.

It did not take more than a minute before they found another opening in front of them. Wang Lei seems to know where it led as he nonchalantly entered it.

---

Skies of the underworld were filled with clouds as thunder raged on its ground and inhabitants -- an unnatural sight to see. It felt as if Heaven was angry at them, even though that sounded ridiculous knowing that Heaven existed in this world. Nevertheless, it made them sacred as they could feel anger and killing intent in the air, even though it was not directed at them.

Up above the House of Naberius territory, on the cast sky, space was ripped open, gaining the Devil's attention. They saw two people coming out of it. One was a young man with silver fox ears and Ten-Tails behind him. He was hugging a beautiful girl, who had cat ears and two tails behind her. She was wearing black yukata while the young man while with haori on.

The young man's dragon-like eyes landed on the people below, making them shiver. They felt as if they were being gazed at by the death god, ready to slaughter them.

"Who are you?! You dared to enter the House of Naberius territory with such arrogancy?!" A middle-aged man shouted as he flew at the same level as them, with other devils following after.

With a gentle harmless smile, Wang Lei asked, "I heard that House of Naberius has killed a clan of youkai called Nekomata?"

"Huh? That cat clan? Yeah, we killed them, so what?" The middle-aged man, still unaware of the fact about who he was talking to, said with arrogance.

Wang Lei nodded, "Good. I am not in the wrong place. Kuro, tell master, do you think that they deserve to live after what they did to your clan? Don't worry about Shirone; I will make sure nothing happens to her." He asked, gently looking at her.

Kuroka felt a sudden surge of different emotions in her. With her fist clenched tight, she spoke with a hateful voice, "They don't! Not only because of them my mother died, they thought of using Shirone in their experiments! And after 'he' was killed by me, the higher-ups decided that our clan was dangerous despite knowing that it was Naberius Clan's fault!"

Her hateful and resentful voice filled the air of the House of Naberius. Everyone could feel extreme haterade from her towards them.

The middle-aged man's eyes opened, "You are the stray devil Kuroka that killed her master! Good! Since you have decided to come, forge-" Before the middle-aged man finishes his dialogue, his head burst into tiny pieces of meat as his blood sprayed out of his headless body that started to fall below.

"I hate talkative people; especially when I am in a bad mood." A young voice was heard by everyone as their eyes landed upon the silver fox, who seems to be still smiling gently as if to hug the whole world with gentleness.

"You bastard! Dare to kill our clan head! Do you think we will let you leave alive!?" The other devil shouted and surrounded Wang Lei and Kuroka.

"Hm, you guys definitely are not Chinese and yet talk like that...amusing to say the least." Wang Lei spoke before he raised his finger towards the sky.

White magical energy started to gather above his finger. The small ball of white magical energy started to rise into the sky as it reached some miles away from him. People could barely see it when it started to expand at a fast pace; soon reaching 100 diameters.

"W-what is that?!" a devil shouted, trembling as he felt the amount of magical energy being released from it.

"Don't blame me when you reach the other side, okay? It was your fault. For what you have done, this punishment feels small." With an extremely calm tone, as if everything is normal, Wang Lei said before throwing the mass condensation of <Crush Magic> at the House of Naberius territory.

"Stop it!" A devil shouted as he and other devils started to use their demonic power in the hope to off-set it, but to their dismay, everything disintegrated when it touched it.

"Let's go." Wang Lei said before making another tear in the space and left with Kuroka, who was looking at the faces of despair of House of Naberius.

As Wang Lei and Kuroka left, the ball of <Crush Magic> landed on the House of Naberius; everything within the radius of thousands of kilometers turns to dust, silently, erasing the House of Naberius from the underworld completely.