Hey guys. Merciless Sun here with the next chapter of How To Stop A Devil Civil War! In the last chapter, Isaac and the others watched the devastating Rating Game between Sirzechs and Raze, Riser's older brother. In this chapter, Isaac and the girls will arrive in the Underworld to find some unwelcome company. Enjoy!

-Shelter Under The Shrine, 1 Week Later, Isaac's POV-

We had made the Shrine our new base, and after hearing Sirzechs had survived the attack last week, we have made plans to visit him after he has rested. We're going to visit him today, that is if there isn't an attack.

I woke up around 7 in the morning with Rias hugging me in the nude, Asia hugging my arm, Isabel hugging Rias, and Akeno hugging my leg. Not bad for just a week after moving to Akeno's hiding spot. I need to get up for training in Magic, but I don't want this to end! Oh well. I woke up Rias, and said, "Good morning, Rias."

She woke up with a smile and said, "Morning, darling. Ready to train today?"

"Yeah."

Akeno then woke up and said, "Good morning, everyone. I see you're greeting Isaac in a very special manner. Maybe I should do the same…" She then pulls her top down slightly to reveal a nipple.

I said, "I appreciate the gesture, Akeno, but I'm a little more focused on seeing Sirzechs. I don't want him to worry about any of you guys."

Asia woke up, and said, "What is with all this….Rias! I knew you were going to steal him from me again!"

I said, "Please calm down, Asia. I told you before that Rias is my girlfriend, and so are you. I love you both, and won't choose anyone over the other."

Asia then hugged me completely, and said, "Alright, I'm sorry."

I put an arm around her, and said, "There's nothing to worry about."

Akeno then got to my head, put my head in her lap, and said, "You sure are a lucky man, Isaac."

I said, "You have no idea. Well, it's time to prepare for today. I want to see how Sirzechs is recovering."

Rias got up, and said, "Me either. I can't believe Raze would just wipe everyone out like that."

"Me either, well, I'm gonna take a shower. See you all at the training field."

-Training Field, 30 Minutes Later, Isaac's POV-

Rias and I came to the training ground, surrounded by bamboo. I was in a meditative position when I pulled out my communicator, put on the level 3 Close Combat training simulation: Bell Cranel. I got up, put on some Daft Punk, and brought out the Rebirth Gear.

"Alright, let's get this shit started!" I rushed to Bell, dodged his attack to the right, and punched him in the side! "Oh, trust me, I'm not done!"

I then gathered fire, but he was able to back up quick. I then ran to him, and decked him square in the jaw! He then put his palm forward and said, "FIREBOLT!"

I then blocked with the Rebirth Gear, and said, "Nice try kid, but this is the Spirit of a Phoenix! Fire doesn't do shit!"

I got angrier thinking about Riser being released and taking Rias from me! "HAAAAAAAAAAAAA! Now this is fire! Nothing will stop me from protecting everyone!" A huge fire surrounded me.

I then put both palms together in front of me, then the fire went between my palms into a 3 inch fireball, and yelled, "Phoenix BURST!" Just then, Rias, said, "Isaac! I think that's enough."

The simulation then dropped to the floor and shattered. I put both arms down, and calmed down. All the fire dissipated, and I dropped to my knees. "Whew! Sorry about that. I got a little carried away, huh?"

She gave me her hand, and said, "I don't mind you getting fired up, but if you keep it up like this, then the enemies will find us for sure."

I grabbed it, and pulled myself up."You're right. It's just this whole situation is a bit too much."

She said, "I know, but Sirzechs is alive. We'll visit him and make a plan afterwards."

I smiled and said, "What would I do without you?"

She smiled back and said, "Probably burn this whole forest down."

"...Point taken." I then laughed, and sensed someone coming near. I looked to the right, and said, "Who is it?"

Just then, Rias and I saw Ravel Phenex come out of the bamboo with a torn red Victorian dress and a few scratches on her face. She passed out, and I said, "No!"

We ran to her, and said, "We gotta take her to get seen by Asia!" I picked her up, and we ran to the shrine. As we were running, her wounds were healing.

-Shelter Under The Shrine, 3 Minutes Later, Isaac's POV-

Rias and I ran into the shelter, and saw Asia sitting with Akeno. Asia saw us, and said, "Oh my goodness. What happened?"

I put her down on a couch, and said, "I don't know, she just appeared, and passed out. She had wounds, but I guess her immortality healed her."

Asia said, "Don't worry, I'll take care of her."

"Thanks, Asia. We'll stay here until she wakes up.."

Rias held my hand and said, "I wonder why she came here looking damaged."

"I wonder how she knew we were here."

Ravel then grunted as she woke up. "Where am I?"

Rias came to the couch, and said, "Ravel, you're awake! You're here with my peerage and partner, Isaac."

"Thank you, Lady Rias."

I then came up, and said, "How did you know we were here?"

"My brother Raze had known for a few days. I came here because I had uncovered a plot to storm the Gremory manor and kill Lord Sirzechs."

I said, "We gotta get there then. Asia, Koneko, please stay with her, and make sure she gets plenty of rest."

Ravel said, "Thank you, Mister Fennis." She then went to sleep.

"Come on, girls, let's protect Sirzechs."

Isabel and Akeno then came with me. We used a Magic Circle to teleport to the Underworld.

-Underworld, Isaac's POV-

We just got here in the front courtyard of the manor, and…"Holy shit, that's a lot of soldiers!"

Hundreds of soldiers with a banner with a Phoenix symbol were steadily marching towards the manor: One battalion of 100 soldiers coming in each direction. We ran into the manor, and were then were greeted by a man with long red hair and a red goatee. He said, "Rias! Oh, my little girl."

She then ran to him, and hugged him. "Father! It's so good to see you."

I smiled, and said, "So that's where you got the red hair from."

He then put a hand on her shoulder as she let go, and said, "You must be Isaac Fennis, the man who saved my girl."

"Yes, sir. I'd love to stay and chat, but it seems the Phenex family means business."

He said, "Yes, they just started storming our estate, which spans hundreds of miles. As far as I know, this is the only place not taken by them. How did you find out about this?"

I said, "Ravel Phenex told us. She ran away after finding out, and is now resting."

"I see. Well, there's no time to talk about that. My wife, Venelana, is healing Sirzechs, along with some of the family's best healers. But it will take a few hours to get him fully recovered."

"Then we better get busy. Lucky Rias and I trained today. What do you want to do, Rias?"

She came to us, and said, "Alright, Isaac, take out the soldiers on the west; Akeno, the east; Isabel, the north, and I'll take the south."

I nodded and said, "Alright, time to show these guys we mean business! And take these communicators, I want to make sure we know when we're done."

Akeno said, "Actually, I think it's time to test out your Magic, Isaac."

"How so?"

She held up a finger, which then started to spark. "Let's make a fire/lightning barrier. Our combined Magic should be powerful enough to incapacitate or even kill any lower-ranking soldiers."

"Oh, hell yeah."

-Outside Of The Gremory Manor, 10 Minutes Later, Isaac's POV-

Rias and Isabel had gotten to their spots, while Akeno and I focused our Magical energies We both then shot balls of fire and electricity above the Manor, which then spread all over the manor. "Now they should be fine."

She said, "Good luck out there, darling."

"You too, Akeno. If things get too heated, don't hesitate to draw back inside the barrier."

She then changed into a priestess outfit, and focused enough lightning into a large hammer. "Don't worry. I've been training too. Say hello to the Echo of Mjolnir."

She then kissed me on the cheek and flew off to the east. "Akeno is right, I am lucky." I then ran off, and was confronted by my enemy battalion. "About time you morons got here. I was getting bored!"

The lieutenant said, "You shut your mouth, boy! Your actions against Master Riser are enough for us to kill you, and parade your corpse around the Underworld during our victory."

"Don't threaten me with a good time! Now that's gotten me all riled up!" I held up both arms, and the Rebirth Gear appeared on both! "I knew that would work! Let's fight!"

I went rushing in, and started beating the lower level guys. "Come on, you're not even trying! The guys at the wedding actually put up a fight!" Fire then started to surround me, and I spread out my arms, and once I did, the fire made a blastwave that blew the weaker guys away.

A big guy in armor said, "I think you'll find your blows won't put a dent in me."

I said, "You may be right." I pulled out my sword, and continued. "But I'm sure this'll help!

He tried to grab me, but Lewis said, "I got ya, man." He then made the Life Fibers into spikes that stabbed into his hands.

"Thanks, Lewis. Give up now?"

"AAH! This will teach you to rebel against the force of nature that is Riser Phenex!"

The spikes went away, and right when I went to jump, he grabbed me.

"Now what will you do, little man!?"

"Oh, you don't want to piss me off!" I started to get angry, and smoke was starting to come off his hands. He dropped me, and I kicked him straight in the stomach!

He then dropped unconscious, and I said, "Well, that was easy."

The rest of the weaker soldiers ran away, and the lieutenant then ran towards me with a spear. "You brat! Taste my steel!" He threw it, and I deflected it with my Rebirth Gear, and counted with a rush and punch in the face.

He dropped, and was still conscious. "Good, you're still breathing. Answer my questions when this is over, and I may keep you that way."

I then focused some fire onto my finger tips, and shot them around him to make chains. "Struggle against those, and you'll be burned."

-Isabel's Fight, Isabel's POV-

I just got to my fight when the lieutenant said, "Halt. What faction do you belong to?"

"Please, I'm a Human, but don't underestimate me!" I then got in the ready stance for the Fist of Flowing Water, Crushing Rock, but before I moved, I focused Ice Magic into my fists.

I then rushed to them, and punching them. As they were hit, they froze. But I grinned, and changed the Magic to fire.

The lieutenant asked, "How can a human possess such power and Magic?"

"Dumbasses! This is the Fist of the Peaceful Devil, a new fighting style I made to protect my beloved Rias from your Master!"

I quickly beat all the weaker guys, and got to the lieutenant. You better be ready for my ultimate technique! Purgatory of the 4 Lights!" I focused fire, ice, lightning, and wind energy into my fists, and punched him in the face and gut! He dropped, and I was exhausted.

-Shrine, 5 Minutes Ago, Asia's POV-

I was looking after Ravel, who was still asleep, when I felt 3 people come by. "Koneko, I feel someone coming by, could you please check?"

"Will do, please sit tight."

She then got up the stairs, and a minute later, I heard fighting, felt a few shakes, and after a scream from Koneko, there was a huge shake! I yelled, "Koneko! Is everything ok?"

Just then, I heard footsteps going down, along with a pretentious chuckle. I then saw Raze Phenex appear. He was dragging an unconscious Koneko, and said, "They use a little girl to protect my sister? Rias truly is a child. But I am interested as to why she chose a nekomata. I didn't even think there would be any more alive."

I said, "You...You better not come any closer, God will protect me!"

"That won't do you any good. If you had an inkling of what my family is capable of, then no Holy energy will affect me!"

I put my hands together, but he then grabbed my wrists. "I said that won't do you any good. Now if you want to survive this, let me speak with this Isaac Fennis."

I cried a little bit, but he let go of my wrists, and I got up to get the communicator Isaac gave me. I turned it on, put the holo-screen up, and called Isaac. "Good…."

-Church Outside Town, General POV-

Xenovia and Irina were praying when they found a drone flying to them and a holo-screen appears with Clark. "Hello, Exorcists."

Xenovia drew her Excalibur of Destruction, and he said, "Calm down. I know you told Isaac you wouldn't help unless Demons are attacking, so now there are 3 attacking your fellow Sister Asia."

They both said, "What?!" Then they both ran off.

Clark said, "Perfect. The things I do for my fellow Wanderers." The screen then shuts off.

-Battlefield, Isaac's POV-

Whew, that...didn't really take a lot out of me. I talked to Rias on the communicator. "Hey, Rias. I just beat my battalion pretty easily. How's your fight going?"

"I'm almost done, darling. These guys are surprisingly weak, and the lieutenant isn't putting up much of a fight. Wait a second. DARK STAR!"

I pulled the communicator away, but as soon as I did, I saw a GIANT explosion of Rias' Destruction energy at least 3 miles wide. She then flew to me with a torn uniform. "That was easy."

"Yeah. I'm actually noticing that. Hey, Akeno, just about done?"

"Yes, sweetie. My Echo of Mjolnir shocked them all out of consciousness the moment it began. That'll teach them to wear metal armor."

"Awesome. How about you, Isabel?"

"Huh? Oh, yeah. Yeah, I just finished up. I didn't think my Fist of the Peaceful Devil would be that strong."

"Your what?"

Akeno then flew to me, and said, "Well, Isabel asked me to teach her in Magic, so after learning the basics, she incorporated them into her martial arts."

"Incredible. Well, if that's all, let's go see how Sirzechs is-"

Just then, the communicator turned on, and I saw Asia. "Isaac?"

"Asia? What's happening? Is Ravel awake?"

Then the communicator was taken by a man...Wait… Rias and I said, "Raze!"

"That's right! You were expecting your dear nun harlot, but it was I, RAZE!"

"You better not hurt her!"

He laughed, and said, "Ah, but it's not her I will hurt!" He then held up Koneko by her hair.

Rias said, "You monster! If you hurt my Rook, I will drag you to the deepest dungeon in the Underworld and leave the beasts to tear you limb from limb for eternity!"

"Oh, my dear, your threats do excite me! I see why my foolish brother wanted you."

"What will it take for you to release them?"

"Simple, surrender."

I said, "There's no fucking way-"

Rias then said, "I accept."

"What!?"

"I'll surrender, just don't hurt Koneko."

"You can't be serious, Rias!"

She then started crying, "She takes priority! If she wasn't in danger, then I would gladly rebel with you, but I have my servants to look after."

Raze then maniacally laughed! "If you can't decide with your Human trash, then I'll send some friends to help change his mind!"

We both said, "What-"

Just then, a Magic Circle appeared, and we saw 2 Fallen Angels: One with black hair and blonde bangs, wearing a black suit, and possessing 12 black Wings; and the other had long black hair, red eyes and pointy ears, wearing a noble outfit, and possessed 10 black Wings.

I said, "You have got to be kidding me! First Riser allies himself with a Fallen Angel, and now his older brother is doing the same?!"

Akeno said, "Not just that, but he employed the help of a Captain of the Grigori, Kokabiel, and the General himself, Azazel."

"You're kidding?! Well, I'm gonna kick their ass!"

Isabel said, "I'm already ahead of you. Let's do this!"

I'd say things took a turn for the interesting! Isaac and the girls found Ravel, who discovered a plot to kill Sirzechs, and right when they defeated all the soldiers, Raze came in and kidnapped Koneko! And right when Isaac refused, that's when the Fallen Angels Kokabiel and Azazel appeared. In the next chapter, Isaac and Isabel will fight the Fallen Angels, and see what other forces could be in play.

-Author's Note-

Well, I'm personally excited to write this storyline. I'll admit, most of what I write is kind of made up as I go (Or the Hirohiko Araki method, as I call it), but I'm glad it turned out this way. As I've said before, if you want things changed or tweaked, please do so in a respectfully manner. Thanks guys.