Disclaimer: I do not own Fate Stay/Night nor High School DxD.

Matou Sakura was beaming, she could lit the entire kitchen with her smile, after all, she was cooking with her senpai again after what felt like ages.

Emiya Shirou has been living in the Clock Tower with Tohsaka Rin and Saber for the past two years, and after an extremely demanding workload including trips all around the world with the enforcers, serving as guinea pig for one of his lovers, exhausting sessions tuning his reinforcements, reality marble and combat abilities with his other lover, he got some well-deserved vacation and went home in Fuyuki.

Being home again was doing wonders for them all. Even the bags under Rin's eyes were already dissipating. 'Of course I will never tell her that, only the root knows what she would do to me this time.'

Shirou and Sakura finished transporting all the dishes to the table where a bemused Rin was sitting in a stare contest with Shirou's latest acquisition for his two girls: Cell phones.

"Shirou, could you please explain to me again why you insist on using these barbaric apparatus. Why don't we just use the communication crystals that my father developed ages ago?"

"Rin, these are suppose to be mobile, as in, take it everywhere we go. Carrying those crystals around are just impractical."

"Shirou has a valid point Rin, Kiritsugu used one of those over 13 years ago, I'm sure a genius like you can adapt very quickly to its workings."

'Thank the root I have Saber, I could never convince Rin on my own.'

"But..." As Rin was preparing an counter argument, a Tiger sized bell saved him from this conversation again. "SHIROOOOOOOU!"

Fujimura-sensei slammed the door open and ran into the living room. "I'M HUNGRY, GIMME FOOD NOW."

"I missed you too Fuji-nee, lunch is already served, help yourself."

Everybody ate silently, as was the unspoken rule when Shirou cooked, and that made them jump when the ring of the cook's cell phone skyrocketed.

*Cough! Cough!*

Shirou took a glance to see if Rin or Saber were messing with him using their shining new phones, only to see a death glare coming from four different people at the table, probably because of the interruption during the long awaited food. "Ah... excuse me girls. Hello! Emiya speaking."

"La-lady Barthomeloi, how did get this number? I-I mean 'what a surprise!' and what can I do for you?"

He could see Rin's glare that said: 'See! I told you the crystals were better!'

"What? But ma'am, I just got home for my vacation." Shirou frowned. "Even if this is in Japan..." The frown deepened. "Isn't that the church's obligation?" And a small smirk was added to his face. "Yes ma'am, I understand. But I have one condition, you have to approve the latest fund petition for Tohsaka Rin's research." "OK, great. Talk to you soon."

Rin's eyes widened and then narrowed. "You know Emiya-kun, I'm really happy you got me my funds. But if you leave me here today to go on a job, I'm going to kil..." Saber only glared at Rin. "Ahem, to be VERY upset."

"Well, not today..." Shirou said sheepishly, while scratching the back of his head.

"Senpai! I can't believe that! You just got here." The look on Sakura's face was like kicking a puppy.

"I'm sorry guys, but I kinda didn't have a choice."

"Ah, if only Kiritsugu were here! Where did I mess up on this kid's education. He was such a gentle boy and now he's a heartbreaker."

"Cut the act Fuji-ne... I know you just want my cooking."

"He hee" The teacher didn't even blush.

-XXX-

That night, after Fuji-nee and Sakura left, Rin joined Shirou and Saber who were sitting on the red-headed's beloved porch and looking at the clear sky, she offered them a cup of tea. She waited until they took a sip at the smoking cup and asked Shirou. "So, what are you getting into this time?"

"Barthomeloi-san said something about demon suspicion and magic disturbance in a city here in Japan." He answered. "I am to lead a group of four enforcers tomorrow morning."

"I thought demons were the church's jurisdiction." Rin said gazing at the sky.

"She said something about an weird Executor already being there, and that we should keep an eye on him too."

"Hmm..." Rin raised a hand and put her fingers in an 'L', assuming one of her lecturing poses. "Something is not right Shirou. Mere demons are passive creatures molded by wishes of humans. They kind of feed of human's bad emotions and soothe them. They aren't creatures that require enforcer hunting."

She took a pause to sip her tea. "So there are two motives for enforcers and executors to be sent there. One, if the demons are possessing people, but that's not likely, because even if the symptoms are inexistent at first, the human possessed progressively loses its humanity and attacks and feeds on other humans. If that were the case, there would be ghouls and dead apostles suspicions, because the attacks are very similar."

"I can't say I like where this is going Rin." Saber said with a worried look on her eyes.

"So that leaves the second option, that is True Demons. They are beings born on nature, possessing magecraft power way superior to mortals. And if there was interbreeding, that place could be residence to beings possessing a bloodline just like that troublesome 'Crimson Red Vermillion' from the Tohno family." Rin frowned. "Shirou, it could even be pure blooded Oni Kind over there."

"I guess with my luck, I'll find all kinds of demons over there. But nothing that I haven't faced before." Shirou said, scratching the back of his head and earning a murdering glare from the two girls.

"Just don't do anything foolish and come back to us, okay?"

"I promise." Shirou got up "Now, let's go to bed, we can worry more tomorrow."

-XXX-

The sky was clouded and the sun was setting when the group of enforcers got to their destination. After a few hours by train, Shirou already knew about the lives of the four enforcers. Donald Hughes, a gray-haired bespectacled man on his fifties, just couldn't stop babbling about his granddaughter. Showed pictures to everyone around - and it was indeed a cute little girl around 3 years old wearing pig tails.

Ernesto Cangliari was in his early thirties, had a nose of the size of a fist, fuzzy eyebrows and was fascinated about old Italian cars, it felt good to talk about cars with a magus, most of them just despise any form of technology.

James and Andrew Stevens were brothers and they held a little antipathy toward the second Magus Killer, something about him being too young lead the group in this hunt.

They checked in a hotel, and Shirou began giving instructions for the evening, regarding individual abilities. Hughes was in charge of setting a bounded field around their rooms to keep them safe and hidden. The brothers would get supplies. The second Magus Killer would accompany Cangliari in a preliminary reconnaissance drive through town.

Shirou was just driving around town in a back-and-forth pattern and couldn't help being amazed with Cangliari's abilities, he could deploy hundreds of tiny ragdoll looking familiars to make a surveillance map of an area. 'If only those ragdolls didn't have the master's nose and eyebrows, they would be quite cute…' "So, what exactly can those little dolls do?"

"Well, all I can tell you is that they create a surveillance grid that I can access from any location, the more dolls I release, higher is the quality of the grid. They can detect even small prana leaks from almost every source and mark signals on a map."

'I guess he doesn't trust me very much yet to tell me the full extension of these dolls abilities, but that's ok, no real magus would reveal their secrets this easily.' "That sounds awesome Cangliari-san, so we will have a full map of the town with showing spots for prana leaks?" 'What would I give to have a similar ability during the 5th Grail War…'

"Exactly, they can detect from small familiars to large spells. And that's the last one, wanna grab a bite before coming back to the hotel?"

"No, we should return and eat with the rest of the group." Shirou replied.

-XXX-

The next morning, Shirou did his normal routine of body exercises and reinforcement, took a shower and joined the group for breakfast in the hotel lobby.

The food wasn't very good. 'If we are going to stay in this town for long, we will need to move to a new safe house, with a kitchen.' "So, how long does it take for your little science project to be ready?" Andrew was looking at Cangliari with an annoyed look in his eyes. 'I guess that I'm not the only one these brothers dislike.' "It's precision work, it will be fully operational by noon." Was the response from the big-nosed guy.

"Usually I tend to be proactive in hunts and be the first one out there on patrol, trying to save as many people as possible. But there is something off in this assignment, and the news didn't report any strange murders or disappearances. So, until we can take a look in the grid Cangliari-san is finishing, we will wait here." Shirou said with a sigh.

The group dispersed, Shirou went to an outside balcony and sat on a bench. A few minutes later Hughes joined him with a bottled cold tea. "I wasn't expecting you to be a good person Emiya-kun, being the son of the Magus Killer. But you really do seem to care about casualties in hunts."

"My father wasn't a bad person Hughes-san, he was just a guy in a ruthless pursuit of an impossible dream."

"Every magus I know is in pursuit of an impossible dream, and searching for Akasha made almost all of them bad guys. What makes your father different?"

"His dream was to save the world. He couldn't care less about the Akashic Records, so do I. The difference from me and him, is that he knew he had to break some eggs to make an omelet, and I selfishly try to make omelets out of thin air."

"I see... And that makes your dream even harder to accomplish Emiya-kun." There was worry in the old man's eyes.

"I'm aware." Shirou's look was determined.

A few hours later, after the grid was ready, they all reunited in Cangliari's room. There was an awesome looking spell on the table, the grid projected like an hologram and Cangliari could zoom in/out and make minor adjustments. 'I hadn't seem google maps yet, I would consider this almost true magic.' There were a few red spots showing prana usage locations, one on the local church and a few scattered around town.

"Not counting the church, there are only minor red dots, that means that all of them are weaklings. This is a waste of time." James Stevens chuckled.

"Pay more attention boy! Can you see us on this grid?" James only shook his head towards the old man. "That is because we are protected by a bounded field. There could be stronger sources protected as well. Kids these days have no patience at all..."

"OK, for today, we will check on each of those red spots, starting downtown, we will go as a group and check them together. Understood?" Shirou was already in his magus-mode.

"Yes, Sir." They all replied. "I'm going to give each one of you one of my familiars, so we can communicate in case we need to spread out. It's just like radio, you speak to the doll, and we all hear it." Finished Cangliari.

"Gear up, we're leaving in five."

The crew went downtown toward the first red spot, they identified the red spot as a woman in cosplay handing out leaflets.

'Trace On' - 'Structural Grasp'

"That woman is a familiar."

"A human familiar? How is that possible? Is there a powerful magus around here? Maybe a Sealing Designate." One of the brothers commented.

"No, she is some kind of a bat familiar disguised as a human. I'll go get one of those leaflets she is carrying." Shirou said moving towards the creature.

The leaflet had a magic circle inscribed in it. "Does any one of you knows what this circle do? I'm dying to pour some prana into it." The crew looked apprehensive. "But let's do this the safe way. Let's just hope she knows how to open an image on her cell." Shirou took out his cell phone, took a picture from the leaflet and sent it to Rin.

Just after he sent the message, he felt it, magical power that smelled what reminded him of dusk invaded his nostrils. 'That can't be good.'

-XXX-

Hyoudou Issei was a having the best day of his life so far, not only a miracle happened the day before when a cute girl confessed to him, he was now on a date with her. He had already bragged about her to his two buddies at school, planned each and every detail for the day, he even bought new pants. 'You never know what could happen.'

He arrived to the date spot two hours before Amano Yuuma did, and during that time, he accepted a leaflet from a weird looking girl. '-Your dream will be granted - How suspicious!'. When Yuuma-chan arrived, he said "Don't worry, I just got here also". 'Ahh, I always wanted to say that to a girl.'

They walked together holding hands! Issei was so moved that he almost burst into tears. They went to a clothing and decorating store and then had lunch on a family restaurant as any teenager should on their date. He felt alive for the first time in his life.

'Mum, thanks for giving birth to me. Dad, I was worried that I wouldn't be able to continue our family line, but it looks like you don't have to worry about that anymore.'

Time flew by and they ended up in an empty park. 'It's the climax!' Yuuma-chan stopped by a fountain and said. "It was fun today!" 'Gaaaah, she is so cute, I want to kiss her so badly.' "Hey, Ise-kun".

"Yes, Yuuma-chan."

"There is something I wanted to do to celebrate our first date, will you hear me out?"

'That's it! That's it!' Issei's heart was almost jumping out of his chest. "O-of course Yuuma-chan, what is it you wish?"

The girl sprouted a big smile. "Will you die for me?"

"..."

'Ehhhh! What the heck?' "So-sorry Yuuma-chan, I th-think my ears just went crazy for a second, co-could you please repeat what you just said?"

The smile on her face became devious and cold and she repeated. "Will you die for me?" She took a step back and black wings emerged from her back.

'Yuuma-chan is just like an angel! Wait...what?' Her features just went cold and her clothes magically changed. 'Gaah. I just saw her boobs for a second there. Now I can die happy. Wait, no! I don't want to die yet, I'm still just a young boy!'

"It was fun. The short time I spent with you. It was like playing house with a little child." A glowing spear appeared in her hands and she threw it at him.

"Trace On!"

-XXX-

Several blades were thrown at the winged woman, she covered herself with her wings and deflected them. Her spear was also deflected by those blades.

'Angel wings? Maybe this girl the the Type-Venus. No, that is not possible, she would be hundreds of times stronger. Maybe she is a descendant just like the dead apostles from Type-Moon. And that spear! It was made of light, I have never seen one like before.'

"What are you and why are you attacking a human? Depending on your answer, I will have to kill you."

"My brethren! I'm in need of your aid!" As the winged woman said that, the space ripped and that smell of what seemed like dusk just became several times more oppressive. Four more dark-winged creatures emerged from thin air.

"Hughes-san, set up a bounded field and protect the brothers, I will guard the boy." Kanshou and Bakuya were traced in his hands and Shirou threw them at the first woman. 'You could deflect regular blades with your wings, let's see how you manage a Noble Phantasm.' The woman did what of expected of her and defended herself with her wings, but this time the blades pierced her wings and she let out a pain shriek. The red-headed traced another pair in his hands.

"Raynare!" Screamed the guy wearing a trench coat and a black fedora hat. Two of the newcomers dashed at Shirou but a blast of wind and fire from the Stevens brothers held back the smaller winged girl with pony tailed blond hair and dressed like a gothic lolita. The other girl with long navy-blue hair clashed the Magus Killer and her spear was parried by his twin swords. The guy on a trench coat made sure his team mate was ok and also charged at Shirou.

Some sort of magic shield was holding the blasts of fire and wind from the brothers, and the blond gothic loli was getting closer. Hughes deflected her spear using his mystic code. It was refreshing seeing the old guy fighting, he had enhancing runes on his clothes and his mystic code was some kind of wrapped gloves that covered hands, forearms and elbows. He moved fluidly and deflected everything thrown at him with those gloves.

The fight was on an impasse, but the last winged guy hadn't entered the fight, he had long white hair, red eyes, wore a silver full body armor and his wings were at least three times larger than the rest of their kind present. He was just hovering over the battle field and had a sharp look on his eyes.

The balance changed when a few ragdolls came flying and Cangliari shouted "Magic Disruption!" All the magic shield protecting the winged enemies vanished. 'Really, how many more support abilities this guy have? I'll ask Lady Barthomeloi to bring him with me on every hunt from now on.' With that, the gothic loli was badly burned by the combined spells from the brothers and they all stopped for a second, with an obvious surprise on their faces.

The white haired guy produced a huge spear and threw it at Cangliari. 'Shit, I won't make in time.' His navy-blue haired opponent entered in his way, the magus shoved Bakuya in her leg and kicked her out of his way. He wasn't fast enough, Cangliari's upper body had blown up with that huge spear's impact. The ragdolls on the crew's shoulder and the ones flying became limp.

"ERNESTO-SAAAAN!" Shirou explosive anger turned into a cold and sharp knife.

"I am the bone of my sword"

"Caladbolg!" Shirou traced an spiral blade and reinforced it until it broke and nocked in an easily traced bow. Aimed the white haired guy and shot.

"Brother!" The trench coated guy yelled and entered in front of the white haired guy with his shield and wings up in a protective form. It didn't matter, Caladbolg pierced, but exploded halfway to the white haired guy. The guy with the trench coat exploded into million pieces, and all that was left was black feathers that rained down on the battle field.

The white haired guy held a hand on a decimated arm, badly injured, but alive. He let go of the bloody arm, made another spear and threw it at the trio, Hughes took defensive stance and took the blow, there was another explosion and the trio was launched in the air, they fell a few meters away, the brothers were heavily wounded and Hughes lost an arm.

In the midst of the chaos, Raynare (the first winged woman) made another spear and pierced Issei's heart.

"Our job is done, retreat now." Ordered the white haired man. Every one of the winged individuals complied, all but one, the navy-blue haired woman made a comment before leaving "My name is Karawana, you better remember that you worm, I will kill you some other time for what you did to Donaseek." And she also disappeared.

The smell of dusk vanished and Shirou took a look at the battleground, Cangliari was dead, Hughes and the other two were heavily injured and the boy was bleeding to death.

'I'm sorry Saber, Father, Rin. I failed, I couldn't save them. Did archer also felt this way? Is that the reason he became a prick? I wish there was something I could have done to prevent this, to save them.'

His pocket started to glow red, a huge magic circle appeared around him and a red-haired woman appeared in front of him. He noticed that the bleeding boy's pocket was also glowing.

"So you were the one who summoned me." The girl said with a sweet voice, and a sweet spiced scent invaded Shirou's metaphoric nostrils. She smelled like anything he had ever felt, it was contagious, seductive, warm. She was ravishing. "You wish to save these people, right? I can do it for you"

"Yes, but what's the catch?" There was no such a thing as a perfect benevolent being, Shirou was no longer that naive kid.

"Ara, you just have to become my servant."

"Do what you have to do."

The girl walked to the three wounded members, poured magical energy in them and teleported them to the local E.R. "I can't do anything for the fourth guy, he is dead, and his corpse was destroyed."

'I'm sorry Ernesto-san, I couldn't help you after all.' "And what about the boy?"

"I have other plans for him you know? You weren't the only one who summoned me." She said while approaching Shirou, she put her arms in his chest and inserted what looked like a chess piece, the knight. "From now on, you'll live for me."

"At least tell me your name before inserting weird stuff in me."

"Ara, my apologies, my name is Rias Gremory, and I'm a Devil." She moved to the boy bleeding on the floor and said. "Looks like you are dying. I'll pick your life up. From now on you will also live for me."

"Devil? You mean a True Demon?" Shirou asked, fearing that the red hair had a connection with the Crimson Red Vermillion from the Tohno family.

"Yes, we are called like that, and now you are a Devil too, you were possessed by my blood line. That means, if you go stray from your master, you will lose control of your mind and body."

'Just like being possessed by Sixth Imaginary Element, how ironic, I even already possess a Reality Marble.'

The girl Rias asked "Can you help me take this boy to his house?" And as Shirou took a few steps to help her, the chess piece that was inserted in his chest was expelled. The girl's eyes widened in response. "Ara, you rejected my blood line, how is that possible? What are you?" She touched his chest once more. "Looks like you have a Sacred Gear inside of you, and that somehow purified my blood line."

"My name is Shirou Emiya." He introduced himself the western way just like she did. "And I'm a Magus. I have a Noble Phantasm inside me called Avalon."

"You may have not turned into a Devil, but I can still feel a connection to you, let me see your hand." On his hand there was a red glowing mark. "How unusual, welcome to the Gremory clan Shirou."

"Thank you. I will be in your care from now on." His phone ringed while saying that. It said Tohsaka Rin on the screen "Hello Rin. Yeah! I noticed it was a summoning circle after a while, thanks. Ah, one more thing Rin, don't be mad at me, but I just screwed up."

-XXX-

A/N: Hey guys, this is my first fic, and I would like to apologize for the childish vocabulary, because English is not my main language.

I want Shirou to be hired as a teacher on Kuou Academy duo to the Gremory Clan's connection, what you guys think? Maybe an PE, or cooking teacher? Or just some random absurd subject that he don't really need to teach, so he can be "responsible" for the club.

What you guys thought about the magi I created? And that white haired fallen angel is also an OC, he is going to be awesome.

Thanks for reading/reviews.