Disclaimer

High School DxD is owned by Ichiei Ishibumi / Funimation

Undertale is owned by Toby Fox

Frisk gave a small yawn as he walked to school. Sans gave him some good-natured ribbing when he came home, but thankfully that was all he did. Frisk had a feeling he knew more than the others assumed about what happened, but there wasn't much to do about that. Sans always knew more than he let on, tricky one that he was. Still, he-

THUD!

"Owww…"

Frisk rubbed his head as he looked at the person he walked into. A girl, a little taller than him, with blonde hair and blue eyes, was rubbing her forehead from her spot on the ground. He quickly stood and offered her a hand up, apologizing profusely. She smiled as she accepted his hand.

"It's quite alright. I wasn't quite watching where I was going, either. Oh! I'm terribly sorry, but I have to go, or else I'll be late!"

He nodded, and she waved back to him as she ran in the direction he came from. It took him a second to notice she had a nun's outfit on. He shrugged and continued on his way to school. Compared to everything else that happened in his life, one cosplayer wasn't that odd…

The two that attacked him were watching him throughout the day. Every spare chance he would stare right at their hiding spot to mess with them. Once school let out he blended into crowd and snuck up on the duo.

"…total freak! He's like the psycho that pops up behind horror-movie bimbos!"

…Oh this was WAY too perfect to pass up.

He snapped a twig and immediately ducked behind a tree. He went prone and got behind the two as they pointed their spears where he used to be. They practically jumped when they turned back around to see him standing there.

"SEE!?"

Minutes passed and neither side moved. Frisk raised a brow, and Dohnaseek nervously cleared his throat.

"I'm sure you're wondering why we attacked you, and why we're monitoring you now."

A nod.

"Our leader has a keen interest in you. Your power is similar to an old enemies', so they sought to end you before you became a threat. Once they realized you weren't said enemy, they sent us to monitor you."

Frisk crossed his arms. They couldn't tell he wasn't an enemy? Really?

Dohnaseek sighed, "Look, I know we haven't had the best introduction, but we'd like to make it up to you. Our leader would like to meet you tomorrow night at the old church a short ways from here."

Frisk was skeptical, but accepted. He didn't like walking straight into the lion's den, but he didn't like risking peace, either. He walked off, leaving the duo behind.

"…Creepy little asshole…"

Dohnaseek couldn't disagree.

Rias watched the boy as he walked through the park. She could understand why the Fallen Angels would risk getting so close to her territory, the magic surrounding him was strange, but very powerful. She would keep a close eye on him and make sure they didn't-

The boy's hand shot up and he caught a soccer ball just before it hit his face. It spun in his grip for a moment before stopping, smoking when it did.

"Nice one, Frisk!"

A heavily-tanned woman and several kids ran up to him and he handed her the ball. She had an eyepatch, and her red hair was pulled back into a long ponytail. Rias noted the illusion spell around her.

"Is this your brother, Dreemurr-sensei?" One of the girls asked.

"Yup!"

The children swarmed the boy after that, asking him countless questions. He sent what Rias assumed was a glare at the woman, and was dragged off by the children. The woman laughed and ran after them. Rias waited a moment, and then started to leave the park.

'Well, I have a name at least. Dreemurr… Hopefully Sona will know more…'

Frisk followed the path and reached an old-looking church. He opened the door and walked in, the four of the five occupants staring at him.

"So you're the insect that is causing us trouble. Frisk…" A woman with almost no clothing looked at him with open contempt. He looked past her to see the two that attacked him, another woman, and the girl he bumped into earlier who was unconscious and shackled to a cross.

"Hahahaha! This little shit is the one who gave you so much trouble!? Ahahahaha!" A man with white hair stepped out from behind a pillar.

"Your brother claimed we'd 'have a bad time' if we tried killing you again. But what he doesn't know won't hurt him. You, on the other hand…" The woman materialized a spear, and she smiled cruelly. The other's pulled out their weapons, and Frisk raised a brow. Before they attacked him, he had to know: why was the girl from earlier stuck on a cross, and why were they still trying to kill him?

"For Azazel-sama, of course! Once I have Asia's Twilight Healing, and with the gift of the Monster's pet, he will make me one of his chosen!"

…She's doing this so her boss will date her? The white-haired man loses it again as the others try not to laugh. She hefts her spear, a look of pure fury on her face, but Frisk reminds her there are a lot of holes in her plan.

"Oh, and what would those be!?"

For one, she's assuming Azazel-sama would approve of what she was doing.

"Of course he would! Azazel-sama-"

Then why didn't she tell him? In fact, why doesn't she contact him now and see how he reacts? She growls, but he can see uncertainty worm its way into her thoughts. Her spear shakes and lowers slightly-

Frisk tilts his head and lets the bullet pass by. He brings up his worn dagger at an angle and the light sword slides off. The dagger handle smashes into the white-haired man's nose with a loud crunch, and Frisk throws him through the window. The two sides stare at each other, until Frisk asks if Raynare called Azazel yet.

"SHUT UP!"

Her spear shakes even more, and she rears her arm back. Frisk starts walking, and she starts hurling spears at him. He barely has to move to avoid them, and as he walks past her they stop. He pries open the shackles keeping Asia secured to the cross and catches her. He picks her up bridal-style, and walks to the doors unimpeded. He leaves, and sighs as he hears a scream stuck between rage and grief.

'Well, everyone does say I have a way of getting into people's heads...'

He reaches a set of benches, and he sits Asia down next to himself. He hears footsteps, and doesn't have to turn to know who it is.

"Bit late for a date, isn't it?"

He glares, and Sans raises his hands in defense.

"Right, got it, not in the mood."

He moves to the other side of the bench and takes off his jacket, draping it over Asia. They sit in silence until Asia begins to stir.

"Mmmh, what? Wait, who?" She looks between the two of them until Sans speaks up.

"You alright?"

"Um, y-yes. Where…?"

"Frisk here found you in front of an old church. I was passing by and saw him carrying you. Want us to call an ambulance or something?"

"Oh, no, that's-"

"Asia!"

'…Hyoudou-san?'

Frisk's classmate ran up to them with two others in tow. Asia stood and ran up to Issei, who looked beyond relieved.

"Asia, I'm so glad you're alright. But why…" He looked at Frisk and Sans.

"Asia can explain more to ya. Huh, I'm a poet and I didn't even know it. Well, we gotta go, so can I have my jacket back, don't want Tori to give me any flak." Sans had a cheeky smile on his face as Frisk facepalmed.

"Oh, of course." Asia handed the jacket back to Sans, who ruffled Frisk's hair.

"Come on, let's get while the going is good." They walked off with one last wave to the group, who started talking eagerly with one another.

She was a hunter, fierce, majestic. On silent paws coated in silken fur, she stalked into the dwelling of her prey. It slept, but she would give it a true, eternal rest. She was close enough now, and the muscles in her legs tensed…

WHUMP!

'…Well, Temmie is up.'

Frisk reached up and lifted her from his face. The white cat-dog dangled in his grasp.

"Hoi! Tem hungry!"

Frisk got out of bed, Temmie under his arm and yawning as he made his way downstairs. He poured some cereal and milk into her bowls, and he took his seat. It was Sunday, meaning everyone was free. Papyrus was eating his spaghetti breakfast burrito, Alphys and Undyne were eating toast with jam, Sans had a 'hot dog', and Toriel had tea, toast, and eggs. He had his own bowl of oatmeal, and as he dug in someone rang the doorbell.

"I'll get it!" Toriel stood, and when she opened the door, he almost spat out his food. Raynare stood there, in a black dress, a frown on her face. She looks around before locking eyes on him.

"You! You have to take responsibility for this!"

You could hear a pin drop as everyone slowly turned to stare at him.

"I was cast out because of you! I have nothing now!"

He reminds her she was the one who invited him over, and then tried to spear him. Toriel processes what he said for a moment, before a look of pure murder overtakes her face and she whips around to face Raynare. Her posture is no longer that of a mother, but of a regal queen ready to bring wrath down upon those before her.

"What." Her voice is like a barely constrained inferno, and everyone can feel the heat pouring off the older woman. She takes a stomp forward and Raynare almost leaps back.

"Stay the FUCK away from my family."

She slams the door and it feels like the whole house shakes. She stomps back towards the table and before he could blink she snatched Frisk into a deep hug. She sits down, and he is now sitting in her lap with his head between her… assets. Several minutes pass as she snorts and occasionally stomps her foot. Everyone has different reactions to what just happened.

Sans is rubbing the top of Papyrus' head, the taller skeleton having crouched underneath the table in fear. Alphys looks ill, and Undyne looks ready for war. He sees Temmie's blue eyes glowing in the darkness of a cabinet. He gently grabs Toriel's hand, and her red eyes snap down to him. She stares at him before closing her eyes and taking a deep breath. She opens her eyes and tears are pooling in the corners.

"My child… did… "

"I'm fine, mom." He flexes for emphasis, and she just lightly laughs and hugs him tighter. The atmosphere lifts after that, and everyone starts eating again. As Toriel reheats his oatmeal with a bit of fire magic, he wonders if Raynare will be alright…

'If I ignore her, she'll go away.'

Raynare had followed him on the way to school the next day, staying a short ways behind. Already the rumor mill was talking about how he had 'gotten with her', hence why she was following him. She broke off well before he got to the school gates, thankfully. The next surprise came when Asia joined the class. The two of them had become quick friends, but she seemed insistent on treating him like a child. According to her, 'he just had that sort of energy around him'.

Lunch was now a trial of patience, Asia insisting on feeding him with the old 'here comes the train' line.

This went on for a day or two until Asia and Issei invited him to meet their other friends. He almost laughed at him of all people being invited to the Occult Research Club. He agreed, but as they made their way to the club's meeting room he felt an odd sense of… foreboding? When they got to the room, a black-haired girl was locking the door.

"Eh, Himejima-san? What's going on?" Issei asked and the girl turned to them.

"Buchou had some important business to take care of, so no meeting today." She takes notice of Frisk and smiles, "Oh, and who is this cutie?"

Frisk introduces himself, and her eyes light up.

"Oh, you're Frisk-chan! Muffet talks about you all the time!"

'…Oh God, that's why I felt so nervous!'

"You should really visit her more often, she says she misses playing with you."

'NOPE!'

"Anyways, I've got some things to take of care, so I'll see you all tomorrow." She left, and Asia and Issei turned to him.

"Sorry Dreemurr-san, but maybe tomorrow?" Asia asked. As much as he wanted to now avoid this place like the plague, he decided not to judge Himejima-san on just a feeling. He promised to meet them tomorrow, and the three set out on their ways home.

'Here's hoping tomorrow goes easier…'

Asia and Issei were in a foul mood the next day, and neither noticed him follow them to the club. When they opened the door, he saw what must've been the other club members look at them in shock. Issei and Asia saw they were being looked at weirdly they turned around and finally noticed him. Before anyone could speak, flames shot up from the center of the room. Once it died out, a blond man was standing and Frisk clapped.

"Ah, good to see at least one of your pieces knows their manners, my lovely Rias." The man looks at Frisk, and his smile grows, "What's this, fire magic as well? Maybe your peerage isn't entirely worthless after all."

'Wait, how does he- Wait, did he just call Issei and Asia worthless!?'

Frisk glares at the man, who sneers.

"Oh, is someone upset his friends are worthless trash?"

Frisk glares at the man harder, and he laughs.

"Then again you're probably the same. I bet your moth-"

Frisk rushed forward, and as he shoves the man his leg hooks around his knee, causing him to trip. As he lies on the floor, Frisk grabs his legs in a vice-grip and delivers a devastating axe kick right between the legs. He lets go, and as the man curls up Frisk exits, leaving the man to groan on the ground, and Issei to laugh as much as he can.

Rias looks toward the door Dreemurr-san left through, mixed feelings in her heart. While Riser definitely deserved that, attacking him was extremely dangerous. She would have to keep a closer eye him-

"That…little…" Riser shakily stands up, and Rias smiles.

"It seems everyone's belief about pure-blooded devils doesn't quite hold true, seeing as a regular human was able to defeat one in seconds."

"What!?"

"Indeed, Dreemurr-san isn't even aware of our kind." She wasn't entirely sure of that, but it felt good to put the braggart down. The heir to the Phenex Clan let out a string of swears, and Rias turned her thoughts to what Riser said beforehand.

'Fire magic, plus that other odd magic… Just who are you, Dreemurr-san…'

Frisk made his way to Grillby's. He had opened a mixture of a bar, grill, and café, and it was where Frisk usually went to unwind. The red-headed man would usually whip up some tea if Frisk was in a foul mood, and right now he definitely was. The door's bell went off, and Frisk was thankful the place was empty. Now, he could just ask the black-haired girl at the count-

'…Oh, no…'

"Frisk-chan, it's been ages! Come on, I'll whip you up something!" Muffet's odd pigtails bobbed as she went into the kitchen, and Frisk approached the counter with the resignation of a dead man. As soon as he sat down, Muffet came back out with a black cookie and an envelope.

"Now Frisk, I have something important for you to do." She waited until he finished the cookie to continue, "My friend Akeno tells me you met her. I actually have a letter for her, but I'm busy for the next two weeks and have to leave. So, I need you to deliver this letter to her. As. Soon. As. Possible." She punctuated each word with a tap to his nose, "Okay?"

He quickly agreed, knowing how bad it could go otherwise.

"Thank you, Frisk-chan! Here, consider this your payment~" She pulled out a folded bundle of cloth and handed it to him. It was pure white, and incredibly smooth and silky.

"Silk from your onee-chan~"

His face felt like it was on fire. He quickly thanked her, tucked the bundle into his pocket and grabbed the envelope. He made sure to drop some money in the tip jar and ran back home, Muffet's giggle still in his ears…

He closed the door to his room and breathed a sigh of relief. He set Akeno's letter on the table and pulled the bundle of silk from his pocket.

'Why do I get the weird ones? Seriously, giving me something like this…'

He blushed, and tried to stop those thoughts from working into his head. He sighed, and started unfolding the cloth, figuring he might as well see how much cloth he-

'…This is a bra… Those are panties… These are a bra and panties…'

He stared at the items before slowly folding them back up and placing them deep into his sock drawer and going to bed.

Frisk stared at the notice on the door.

Ten days.

The Occult Research Club would be gone.

For ten days.

'No. it's okay, it's fine, I'll just… wait…'

However, at the end of the ten day wait Akeno was still nowhere to be found, and Frisk was a few steps short of a panic attack on the eleventh day.

'Come on, Akeno, please, I can't let Muffet get her fangs in me! Damn it, why don't I have anyone's number!? Burning in a pit would be more merci- Wait… That jerk from last week could use fire to teleport, right? Maybe…'

Frisk nodded to himself, and rushed to Grillby's after school. The man's face didn't change as Frisk explained the favor he desperately needed. When Frisk finished, Grillby merely stared before nodding. He walked into the kitchen, before returning with Fuku and Heats.

"Don't worry Frisk! We're here to help!" Fuku nodded resolutely, her green ponytail bobbing with the motion. Heats nodded as well, the elderly mans greased-back red hair reflecting the light. The four made their way to the fire exit, and each channeled their magic as they made their way through…

Rias glared at Riser, her remaining pieces doing the same as they caught their breath on a nearby roof. They had reduced him to just his Queen and a Bishop, but Kiba and Koneko had been taken out of the fight, and Asia was beginning to tire, as they all were. Riser conjured his fire in his hands as his pieces prepared to attack, and Rias' group did the same.

'We can do this! We can-'

The door to the roof slammed open, and Rias almost panicked when she saw the flames within.

'A trap!?'

Before she could do anything, a figure- no, figures strode through the flames. Three… fire elementals? The tallest wore a bartender's vest and apron, the next was green and had a sailor-suit school uniform on, while the shortest wore nothing. The last one was-

"Dreemurr-san!?" Asia shouts behind her. He looked among them frantically before his eyes locked on Akeno, and he ran straight to her. He held up an envelope, and Akeno as took it, she seemed even more confused than before.

"Wait, this is from Muffet?"

Rias opened her mouth to ask just what in the world was going on, but Riser apparently had enough waiting and launched a fireball…

…with Dreemurr-san right in its path…

The world seemed to slow down as the flame got closer and everyone desperately tried to stop it. But still, they were too slow, and the flame made contact…

…only to harmlessly splash against the boy.

"WHAT!?" Riser shouted, and his shocked was shared amongst all but four people. The tallest fire elemental looked at Dreemurr-san for a moment before giving him a small nod, and it started walking towards Riser. Riser channeled more flame into his hands-

SNAP!

And was sent screaming down to the ground, clutching the smoking cavities that once held his eyes.

The elemental leapt down from the building, walking towards Riser when it landed. His Queen snapped out of her stupor, and sent a blast that was intercepted by the smallest elemental. A mouth that took up most of its body opened, and caught the blast within. It seemed to chew for a moment before sending an even bigger blast towards Yubelluna, who went down from the resulting explosion. Ravel was taken out before she could even raise a hand, green flames circling and binding her. In the time all this happened, the tall one had finally reached a now healed Riser.

"Damn you… I don't know who you are or why you dare to-"

SNAP!

Another snap of its fingers ignites Riser's tongue and he screams.

"Baherd! Ooo will pay for that!"

SNAP!

Smoke pours from Riser's ears, and he screams as he falls to the ground clutching his head. He regenerates, and as he shakily stands Rias finally understands what's happening

'The flames are actually hurting him. His body can regenerate, but the sheer pain is taking its toll on his mind.'

"You think, this will stop me!? I am the Phoenix! I-"

SNAP!

His entire head is smoking, and he goes down screaming once more. When he stands, the elemental continues to snap his fingers, different body parts exploding before it brings both hands forward and snaps. The blast consumes Riser, and when the smoke clears Riser is on the ground, unconscious and covered in burns. The elemental stares at Riser for a moment before making his way back up to the roof. When it gets there, the human amongst them glares at it, and it rubs the back of its head. He points to the still flaming doorway, and when the four of them make their way back through it closes.

The Rating Game finally ends, and Rias looks back at her peerage, each looking as confused as she is.

"Buchou… does… does this mean Dreemurr-san is on our side?" Issei's question gives her pause, and it's almost a minute before she answers.

"…I don't know Issei. I… don't know…"

Lord Phenex stares at the now dark screen, taking a sip from his cup. Sirzechs had almost stopped the match and called security, but he convinced him there was no true danger. He knew Grillbeoz was basically giving his son taps, and honestly it would help Riser realize even the Phoenix's power had limits. Though he would definitely have to speak with Zeoticus about this. Their investigations turned up nothing in Mount Ebott after the Barrier broke, and they had assumed the worst. Yet here was one of his oldest friends, healthy and still as powerful as he remembered.

Though, it did beg the question of who the human was. Monsters lived for a long time, and if Grillbeoz was still around then others from that age must be as well.

And the Devils damn well knew how old grudges festered for the long-lived...

AN: To be clear, yes, I basically made Uncle Grillby have a Roy Mustang moment, and Akeno and Muffet are friends due to a mutual enjoyment of bondage.

I REGRET NOTHING.

Next chapter, important meetings are held, unimportant meetings are held, and confusion abounds.