I don't own anything except for OCs.

It was a few days after Matthew and Conner had picked a song for their show for the classroom observation, and now Matthew had the house to himself, taking a nice, relaxing bath.

At least, he thought he had the house by himself.

He was too distracted by his thoughts on the song, having the house to himself, the bath, having the house to himself, his love life, having the house to himself…

He didn't hear the door to the bathroom open and a splash next to him. He did smell something nice…

Matthew looked to his left and saw Rias had joined him in the bath.

He didn't have the house to himself anymore… But he did feel two soft mounds on his arms.

"I wanted to have a bath with you like this once." Was the reason Rias had joined him, she had a smile on her face and had pressed her body even more onto his. He smelled the shampoo from her hair and it was…really nice.

"Hey, Matthew. Do you hate it when I join you while taking a bath?"

"What? Oh, no. I was distracted, sorry. It's nice that you're here." Matthew replied, now out of his thoughts and smiled at her.

"Just by hearing that I am happy. Can we bathe like this every day?" Rias sweetly asked.

"I don't think I can…take this every day. Does three or five days okay?" Matthew said, trying his best to hide his erection from the girl next to him.

She placed her head on his shoulder and wrapped her arms around his chest, smiling. "I think that's okay."

Now Matthew really had to hide his erection. He tried to cover it with his hand but Rias grabbed his wrist.

"Do you want to attack me?" she said, now moving to straddle him. Matthew was pretty sure she had felt his dick now.

"It's okay… we're the only ones at home right now…" she was smirking devilishly now. She was sure he would. And he did.

He wrapped his arms around his waist, his lips covering her own. She moaned, giving him to chance to thrust his tongue inside her mouth. She immediately fought his tongue for dominance while one hand had slowly went to his cock, pumping it slowly and sensually. Matthew moaned and had one hand squeeze her breast and another on her clit, rubbing it and a finger had went inside her. He stopped kissing her and started kissing her neck, causing her to moan louder. The water inside the bath had started overflowing and it started dripping into the ground.

"Do you like it when I kiss your neck?" Matthew asked, continuing his ministrations of his hands.

"Ye-yes." She replied still pumping him, now at a steady pace while another hand had wrapped around his head.

"Alrighty then." Was what he said before once again started to kiss her neck. He had another finger inside her now, the hand groping her breast now pinching her nipple. She pumped him harder, causing him to moan and stop kissing her neck and went back in her mouth. They fought for dominance, before Rias moaned into his mouth, and he felt his fingers got wetter as she came. Her pumping got erratic, causing him to go over the edge and felt his seed fire out of him, coating her hand and belly with it.

Matthew slumped back on the bath tub, saying "That was…."

Rias looked at her hand that was coated with his seed. "It's so hot… this is what makes a child hm?"

"Pretty much, yeah." Matthew replied, then his jaw dropped when he saw her licking it off of her hand then scooping some on her belly. She glanced at him, then started overdoing her actions, locking her eyes on him. If he wasn't rock hard before she did this, he was now.

"…Tasty." She said, finished cleaning herself up then moved so that her back was against his chest and Matthew held onto her waist.

"Let's stay like this for a while, please?" Rias told the Zagan, who nodded and smiled at her.

The next two days later, everyone in the ORC had gathered in their clubroom.

Issei told Rias about him meeting Azazel, the Governor of the Fallen Angels. Sufficed to say, Rias had got mad and told him that Azazel was interested in his sacred gear.

"Seems like Azazel is eyeing my Sacred Gear after all. He is the Governor of the Fallen Angels, right?" Issei asked them, letting his worries out.

"I heard from someone that Azazel has deep knowledge about Sacred Gears. I also heard that he's gathering capable Sacred Gear holders. But it's going to be all right." Kiba butt in, but he continued. "But I will protect you."

Issei was mortified at how Kiba said that while Matthew and Conner were both trying to hold in their laughter.

"…Um, no. I'm happy but… how should I put this… if I hear things from a man with a straight face then I'll be troubled on how to respond…" Issei was not happy with what was happening.

"It's obvious that I'll say that with a straight face. You saved me. You and Matthew-senpai did. You're my precious comrade. If I can't save a comrade from crisis then I can't call myself a Knight of the Gremory Underworld." Kiba continued, Issei getting more and more uncomfortable and Matthew looked had stopped laughing when he heard Kiba say his name. 'Please don't say that to me too…' he thought.

"There's no problem. My Sacred Gear that attained balance Breaker and Issei-kun's Boosted Gear, if we combine these two, then I feel like we can surpass a dangerous crisis… Fufu, I wasn't the type to say such things before. After hanging out with you, my readiness for comrades also changed as well. But I don't know why I don't dislike that… It's getting hot around my chest region." Kiba told Issei who had eyes wide as saucers and Conner and Matthew now laughing their asses off.

"Don't… Don't come near me! Don't touch me!" Issei yelled, trying to get away from Kiba.

"N-No way, Issei-kun…"

"However, I wonder what happened… besides not knowing their movements, it's difficult to move here as well. The other side is the Governor of the Fallen Angels. We can't even come in contact with him." Rias stated.

"Azazel has always been like that, Rias." A voice stated. When everyone looked at the direction the voice came from, they saw Sirzechs Lucifer, smiling pleasantly. Akeno, Kiba and Koneko kneeled while Asia, Issei and Xenovia had confused expressions. Matthew and Conner simply waved their hands and greeted them.

"Hey, Sirzechs!"

"Hello, Sirzechs-sama."

"O-O-Onii-sama!" Rias let out a surprised voice.

"Azazel won't do anything like Kokabiel did a week ago. He may do pranks like last time, though. The Governor will come earlier than the planned date." Sirzechs stated while the three had also kneeled. Matthew saw Grayfia behind the Maou and subtly waved, the maid then nodded with a very tiny smile on her face.

"Please relax, I came for private business today." He continued. "Hey, little sister. This room feels like a murder scene. I wonder how it is possible for this place to be full of magic circles even though young girls gather here." He finished, surveying the room with a bitter smile.

"Onii-sama, w-why are you here?" Rias asked doubtfully. You don't see a Maou causally show up in the Human world.

Sirzechs then handed her an unfilled printed form. "What are you saying. Classroom visits are coming soon, right? I'm thinking of participating. By all means I want to see my little sister working hard in studies up close. I also wanted to see Matthew-kun and Conner-kun's show."

"How'd you- right, you guys kinda own this place." Matthew said. "I'm gonna guess and say that Grayfia told you, right?"

"Yes, the reports from the school come to me who has been entrusted with the schedule of the Gremory household. Of course I am Sirzechs-sama's Queen as well, thus I reported it to my master." She said while Rias sighed.

"Even if my Maou duties are hard, even if I have to take a day off from my work, I wanted to participate in my little sister's class visit. Don't worry, Otou-ue will come over as well." Sirzechs said.

"T-That's not true! Isn't Onii-sama the Maou? To leave your job and come here! The Maou can't treat a single Devil in a special way!" She tried to convince her brother to not participate but she knew she failed when he heard the next words that came out of her brother's mouth.

"No no, this is work as well, Rias. Actually I thought about conducting the conference between the three factions in this school, I came to inspect the meeting place."

"Here? Really?" Rias and everyone except for Matthew and Conner had their eyes wide.

"Ah, This school somehow seems to have fate tied to it. My little sister, The Legendary Sekiryuutei, Matthew Zagan of the Zagan Household, The Holy Devil sword wielder, The Holy sword Durandal's wielder and Maou Serafall Leviathan's little sister are attached to this place. Kokabiel and the Hakuryuukou attacked this place. This is a phenomenon you can't label as a coincidence. Strong powers keep mixing in, it's like a wave motion. And I think the person accelerating this are Matthew Zagan-kun and Issei Hyoudou-kun." SIrzehcs glanced at the two mentioned, Issei getting nervous while Matthew rubbed the back of his neck, smiling sheepishly.

"Are you the Maou? It's nice to meet you, I am the one called Xenovia." The blue haired girl introduced herself to the Maou.

"Good day, Xenovia. I am Sirzech Lucifer. I got the report from rias. The Holy sword wielder of Durandal got reincarnated as a devil, and not to mention becoming my sister's family… Truth be told, I was doubting my ears when I heard it the first time."

"I also didn't think that I would become a devil. To be reincarnated into the side I kept killing, even if I say so myself, I sometimes regret it and it was a very bold move. Yes, that's it. Why did I become a devil? Desperation? However, at that time, truthfully, anything was fine… But, was it really fine to be a devil?" Xenovia started rambling while Sirzechs had chuckled.

"Hahaha, it's great that my little sister's family has a lot of interesting people. Xenovia, since you were just reincarnated you won't understand your own way but I want you to support the Gremory household as Rias' family. I'll be counting on you."

"I I am asked by the Legendary Maou written in the Bible to do it, then I'll have no choice but to do it. I don't know how much I'll be able to do but allow me to do whatever I can in my capability." She stated, making Sirzehcs smile.

"Thank you." Cue red blush from the bluenette. "Now then, let's continue the difficult conversation seomwhere else. Hm, however, even though I came to the Human world, it's night time. Would a lodging institution be open right now?"

"You guys can sleep at my house." Matthew said, raising his hand.

"I see. I'm relieved that my sister wasn't causing you two any trouble."

"Nah, she's been good to the both of us."

"Yes. Matthew was also doing some very good things to her." Conner received a slap to the back of his head while Matthew simply smiled innocently.

At first, Sirzechs might have disagreed but remembering that his little sister was living there, he consented.

"No! No!" Rias resisted, cutely Matthew might add, but you can't really stop a Maou and his Queen, can you? Matthew made a mental picture of her red face.

Conner then went to a drawer with a lot of different alcoholic drinks and pulled out a sake bottle.

"Say, wanna drink?" The Queen asked, making the Maou smile.

"Of course! Let's drink it by all means!"

And so began the drinking contest.

"Wh-What…I can't sleep together with Matthew?" Rias asked his brother.

The drinking contest finishined with Conner passing out, so Matthew decided that he would make Conner sleep at the couch while the girls would be sleeping on his room. He also left a note saying that said girls would be in said room.

"I wanted to talk with him a bit while being on the bed. Sorry, Rias, but just for tonight lend me Matthew-kun." He said.

Ever since before she moved in, she started sleeping on his bed, making Matthew her pillow. So of course, she would become somewhat dependent on him. Sometimes she would say that she has an illness, that if she doesn't sleep with the Zagan she'll die. He thinks that's just a shit excuse. Not that he'd say that out loud.

He heard his name being called and felt Rias wrap her arms around him. "Can you sleep alone? Are you alright with me not being beside you? I'm not alright though. Just by you not being beside me…"

Matthew felt like a damn puppy in this situation.

"It's just for tonight, okay? I swear I'll make it up to you." He tried to comfort her as best as he could.

"…Okay."

"Ojou-sama, let's return to Connor-kun's room. I will be there in your room as well. Well then, Sirzechs-sama, good night." The maid said, taking the Gremory heiress away from him.

"I know, Grayfia…"

Matthew turned to the Maou and said "Shall we?"

Sirzechs nodded and they both entered the room.

"You sure you don't want the bed?" The Zagan asked, he didn't want to feel like a bad host.

"Of course. If anything I'd prefer this. No one ever does overt there. Living like this is more comforting than a pampered life."

"Well you are the Maou."

"That I am." Sirzechs chuckled. "Thank you for taking care of my sister. Even if you met because of an engagement. If you want, you may call me Onii-san."

"It's nothing. Besides, it's like my biological dad's final wish. And I don't think I'll call you that until I actually marry Rias. But I can see you as an older brother."

"Of course."

"...I don't think that they'll like my past."

"They won't. But they will accept you who are when you do tell them."

"…I hope so."

"You will tell Rias about the blonde, yes?"

"I will. Just not now."

"…Of course. You may take your time."

And take his time he will.

So here's the start of Volume 4. Was the start good?