Tigrun: Hi everyone, here is an idea that I first had when I thought about combining High School DxD universe with Katekyo Hitman Reborn. Since people kind have like, I continuing it but in better.

DISCLAIMER: Tigrun doesn't own Katekyo Hitman Reborn and High School DxD, he only owns his story.

Reborn as a Phenex Chapter 1:

Previously:

Nothing actually happen before, since it is the first story.

(God's POV, well he is dead in high school DxD but he is still omnipresence)

"How dare you do that when Buchou, your fiancée is right next to you?" Issei yelled at Riser as he was feeling his queen body. "Son of bitch!"

"Lowlife, how dare you say that?" Riser replied back glaring at him as he stopped feeling his queen making her relax a little. "Do you even know your place?"

"It doesn't matter!"" Issei yelled back at him with more intensity.

"Issei, stop it." Rias said in a not so loud voice but stop as she heard what he was going to say.

"I am just her lowly slave, nothing less, nothing more!" Issei yelled at Riser with his hand glowing and changing into his sacred gear because of his will making Riser angry at his insolence. "I don't care about the game. I am just going to kick your ass here and now!"

"Miya." Riser called one of the girls in his peerage.

A young girl came out like lighting in front of Issei dressed in a samurai fashion with a wooden staff, and then proceed to end him in one quick blow…

…

…

But weirdly the blow didn't connect.

"You have really done it, Issei. But it only makes the game more interesting. Let me in a little." The only human here said as he stopped the blow with a bamboo stick. His name was Yamamoto Takeshi and was one of the best friend of Issei and the prince of the school: the baseball and kendo Prince.

*Flashback*

(Issei's POV)

Here we were in the Occult Research Club with Buchou trying to convince once again Yamamoto Takeshi into her peerage. Once again, they had a hard time convincing him because of his playful attitude.

Knowing Yamamoto as my childhood friend, this conversation would get them nowhere. Yamamoto was his longtime friend who wasn't pervert like his others two best friends. He was considered as an idol in the school just like the Prince Yuuto Kiba. He was loved by everyone as he was the ace of the Baseball Club and the Kendo Club. But frankly he didn't show any interest in any woman, I wondered if he was gay which could be only good for me as many girls would be disappointed and would try to do something desperate and I could be that thing.

He also was a dangerous man when he got into something, even if it seemed he never took seriously his opponent except when he has a baseball in his hand. The only thing he had problem with was with his classes. He mostly slept into class because of his two clubs. He came early every morning to train with Baseball and Kendo.

Frankly I never wanted to bring him into the supernatural world, but he followed me after I went to him for advice on what to do against the fallen angels and to save Asia. However, he did a good thing following me, he saved me from the others fallen angels.

He was truly strong especially when his bamboo sword transformed into a real sword covered by blue flames which to have slow down the angels for some reason. He took them out easily after saving me quickly before Buchou and the rest of her peerage came to help us.

He, after letting the fallen angels go without being punished and killed by Buchou for daring to hurt her precious servants, followed us to the Occult Research Club. Rias, in exchange of telling him about the dark face of the world, wanted to know more about him like how he succeeded in defeating easily fallen angels.

He told them about his power that created blue flame, he even showed them a necklace that he produced with his will, which seemed to have the motif of a sword with a X on it. He told them about the power of tranquility from his flame.

After he showed his power, Buchou proposed to join her peerage as her new knight. He kindly refused with a smile telling them there was only one person he could work for. But he still accepted to join our club to help us if we are ever in the need.

So here we were with Buchou trying to convince him once again but as always he refused because he didn't to work for someone else than his old boss. Akeno seemed to like his presence as well as Koneko and Yuuto.

Akeno just liked his presence as an attractive boy and a really strong one too who could make the effort of his enemies so useless made her a little wet.

Koneko liked his outgoing attitude and especially his cooking as he brought food every day at the club that she particularly enjoyed: raw fishes/sushi.

Yuuto liked the boy because he was his only male friend and a idol like him. He also was fun to spare with especially since he is so good with sword and his technique is so unique and strong.

(God's POV, well he is dead in high school DxD but he is still omnipresence)

Then suddenly, a magic circle appeared and two people came out of it. Rias identified the two people as the maid, the queen and finally the wife of her brother, Sirzechs, named Grayfia and her red haired twin brother, Hayato Gremory.

"Oni-chan and Grayfia-nee-sama, what are you doing here?" Rias asked politely.

"We are here to supervise your meeting with your fiancé." Grayfia told her politely bowing while Hayato was grumbling because of him being here with some useless humans and wasn't with his precious person.

"Why do I have to be here?" Hayato said out loud grumbling. Then suddenly an arm was wrapped around his neck.

"Hayato, you haven't change much, have you?" Yamamoto said laughing. The people who knew Hayato worried about Yamamoto, he was known to have very small patience, and blow really easily except for one person. But to their surprise, he only grumbled.

"Shup up, Baseball freak. I have other things to do than to take care of your idiocy." He said with a little bit of anger.

"Ahahahahah. Hayato, you are as fun as always." Takeshi replied back.

"You are annoying." Hayato finished glaring at him but Rias could see that her twin brother was happy to see that boy. She understood now why he didn't accept her proposal. He already had a strong king to protect.

Frankly she didn't know much about his brother, he didn't listen to anything his parents say, he only listened to their big brother and to Grayfia because she was that scary. He acted a lot like a delinquent, but it was true he went a lot to the Phenex mansion. She didn't really know much about the boy he came to see. She only met him a long time ago, but he loved to talk about him.

Then suddenly another magic circle appeared but this time it came with a lot of flames. The one who came out was Rias' fiancé, Riser Phenex and soon after came his all-female peerage. He decided to make that low-life understand his position as he kissed his queen.

*end of the flashback*

'You still think this is a game!' Issei yelled into his mind but also thankful for his friends help.

"You don't understand the situation, human. You shouldn't interfere if you know that is good for you." Riser said not understanding why where there a human here with devils.

"Yeah, my friends always told me the same thing. But it didn't stop me from fighting to protect what is precious to me." Yamamoto told Riser as his bamboo sword transform into a real katana with some blue flame coming out of it and he became serious, a look that Rias' peerage knew too well as it never brought good news to their opponents just like for that pervert priest.

"That flame." Riser said deadly seriously.

"It must be the rain." A blond girl in Riser's peerage also known as his sister, Ravel Phenex. "We found one more for Oni-sama."

"Yeah, you are right. It's the rain guardian, Yamamoto Takeshi." A voice said coming from a new Phenex magic circle. A beautiful one-eyed purple hair girl wearing a black suit with a black shirt showed herself giving a dangerous aura.

"Chrome Dokuro, the queen of the fourth son of the Phenex family." Grayfia told her position as she bowed a greeting. Chrome did the same thing out of respect towards the strongest queen.

"What are you doing here, Chrome? Should you be at Juudaïme's side as his queen?" Hayato asked angrily not wanting his dear boss to be safe."

"Bossu is currently busy at a meeting with Serafall-sama." Chrome told him with a little jealousy in her voice that Hayato could easily since. Serafall and her bossu were really good friends who usually spend a lot of time together as equals unlike a lot of people the fourth son spend time with. And every time they spend together, Chrome would get a little jealous that she destroyed some forests.

"Chrome-chan, it's really you?" Yamamoto said changing his attitude from serious to friendly.

"It has been a long time since we all last saw each other. If you want, you can come to the mansion to meet Bossu." Chrome said as she bowed politely. Yamamoto was surprised by that action, true Chrome was polite but never this polite, 'what happened in this world?' He thought.

"Sure, I won't mind. Do you guys want to join?" Yamamoto said smiling so brightly that his friends seemed to have been blind by it.

"We don't want to impose." Rias said not wanting to spend more time with her fiancé.

"I am sure he won't mind, right Chrome-chan?" Yamamoto told them with his bright smile. It really made his friends wonder who they were going to meet.

Rias only met him when he was a child because of Hayato but Hayato would not let anyone talk to him. But he would usually speak of him highly at home. He was the last son of the Phenex family, not a lot was expected from him but was overprotected by everyone from the Phenex family and his few servants because of his unusual appearance that didn't suit any Phenex but he was said to have powerful flames. This was the reason Riser is her current fiancé when it should have been him.

"Bossu won't mind as long as you are friends of Yamamoto, you will receive a big welcome from him. It's part of his kindness." Chrome said formally surprising the devils about the difference of characters between the brothers.

"I don't want my sweet little Otouto to be expose to such lowlife." Riser told his brother's queen, repelled by the thought of his brother been corrupted by such a lowlife and pervert.

"I agree; I don't want my kind Oni-sama to be expose to such a pervert." Ravel said glaring at the pervert in question.

"You are right; I won't want that too." Hayato said calmly agreeing with the family of his beloved Juudaïme

Issei was in his emo corner after being the reason that they couldn't go to a mansion where they should be a ton of maids in their maid uniforms. His emo thoughts were interrupted by a laugh from Yamamoto.

"You shouldn't worry about that, Tsuna had handled more than his fair share of perverts." Yamamoto said still laughing a little.

"Yes." Hayato said nodding.

"It's true." Chrome told them remembering all the perverts her dear king had encountered.

"Fine, but he tried to do anything to my brother, I will punish him myself." Riser said glaring at the boy.

"Wow, they have only met you for least than five minutes and already decided that you are a threat to their dear brother." Akeno teased the pawn who was depressing even more with Asia by his side to try to comfort him.

"Akeno, stop it. Then we accepted your invite, Chrome-san." Rias agreed to their proposal as she couldn't find a way to oppose it.

"Good, then come on in my transportation circle." Chrome said as Yamamoto joined her as well as everyone. But before they could go, someone knocked on the door.

Rias then gave the permission to enter. Then Sona, her peerage, another black hair girl in a magical girl cosplay and a brown hair boy with warm brown eyes.

"Sona-san, what are you doing here?" Rias asked her not knowing what she was doing here with her sister and that weak looking boy.

"Onee-chan wanted to visit me and the school, because Tsuna-sama will be joining our school next week as he finally had his parents' authorization to join our school.

"Tsuna-sama?" Rias asked not understanding while she was using honorific suffix.

"Why do you still call me with that horrible suffix, Sona-san. We are equal, aren't we?" The brown hair boy said annoyed by his suffix blushing a little.

"Don't worry, she just likes teasing you." Serafall told him loving each second she spent with him. He was so cute especially when he was blushing, she knew her sister thought the same thing with little time they spend together, when she brought him along to see her sister.

"Tsuna, is that really you?" Yamamoto asked as he was frozen by that boy's appearance.

"Yeah, it's me. Okaerinasaï, Takeshi-kun." Tsuna said with his smile that seen to have make everyone more comfortable and warm, with some girls blushing because of it including some girls from Riser's peerage.

"Tadaïma!" Takeshi said smiling but also cried a little as he was finally home with his family, the Vongola famiglia. He was so glad, the only one he would follow even after death was right in front of him. He will make sure this time that he never loses him again.

"Who is he?" Rias asked as her peerage wondered the same thing.

"He is our king, our sky, the one who we swore to protect, the fourth son of the Phenex Family, Tsunayoshi Phenex." Chrome explained with a warm and proud face.

I hope you have at least enjoy this story. If this story is really like by you guys, I may continue and have to figure a pairing or ask you guys for it. So vote for the parings you guys want. I think I kind of improve but there still a lot of work to do on it. I will explain later about Hayato and Chrome.