I have summoned several servants. Males and females, fought alongside them, trying to correct singularities that came by non-stop, all in order to save humanity. This mission...is heavy. However, I am fortunate that I got the Servant, Okita Souji by my sides. We pass a lot of time together, and we can almost say we are lovers. The problem is...Okita is really cute, but she's oblivious to the concept of love, or more like she never was able to experience it with her duty, and also her disease, which made her life come to an end pretty quickly. That's why, I wonder...does she love me back? I got my answer later on...

Right now, we were in a singularity involving the Japan of the past. Of course, Okita was quite excited about this. We sided with some stray servants, notably Archer class Oda Nobunaga, Berserker class Hikjikata Toshizô, Rider class Ushiwakamaru and Assassin class Sasaki Kojirô. However, the enemy was still unknown.

Right now, we were resting in a small room in the shinsengumi headquarters. Okita and I were sharing a room with two futons next to each others, and calmly eating dangos. Tomorrow will be the final assault, so we need rest, in particular with Okita's constitution.

"It'll be over soon, huh?"

Okita asked while rocking my legs back and forth on the outer corridor of the building.

"Yeah...we'll be able to save Japan soon now…"

"S...say...Master...I...have something I want to ask...or more like, I feel like I have to say it to you now."

"Mmmm? Yes? What is it? Everything for Okita-chan."

I petted her hair and her ahoge swayed left and right. Her silky hair were really smooth and felt good at touch.

"So? What is it?"

"W...well...you see…"

She was somehow really red. No...it's not "somehow"...I'm not that dense…

"The...the truth is...Master, Okita r-...really...really loves you. N...not just as a Master but...as a man too."

Her confession...left me wordless, and I just couldn't answer directly, and it wasn't finished yet.

"I really know a lot of your great points, I really...really like a lot about you. I like your warm hands, I like your kind gaze, I like when we eat dango together, I like when you laugh and make all around you fluffy. I also like you who are not only kind to me who cuts down people, but to me that easily falls in battle, and yet always allow me to fight battles I want to fight in…"

Each "I like" made my heart skip a beat, perhaps making it a bit dangerous. Fortunately, Head nurse (Nightingale) wasn't with us there...Anyway, I felt really hot and embarrassed because of that, but still were able to face Okita.

"You see Okita, I too...feel the same about you. I like...your always energetic and frank behavior, your persistence in whatever you do, and I like all the time we pass together...that's why, if you want, let's go out together...no...Okita, can you be my girlfriend?"

"...yes, it'll be with pleasure."

Small tears were forming on the corner of Okita's eyes. Tears of happiness...I gently brushed them off and we leaned to kiss each other, but…

*thud*

People showed themselves from behind the sliding door. There, we saw Nobunaga, Ushiwakamaru, Hijikata and Sasaki who were on the ground. Were they...until now...spying on us?

"Ah...ahaha, p..please don't mind us, keep going…"

"Like hell we can continue! You just spoiled the mood, you idiot!"

Okita and Nobunaga often fought each other, but they were good with each other, almost like friends, if not yet. I also got felicitated by Hijikata, Sasaki, Ushiwakamaru, Nobunaga and all the active members of the shinsengumi lending us their help here, even though they weren't servants. We drank sake until we were knocked out, though as I am not a servant, I had to drink in moderation to avoid having a headache in tomorrow's final operation.

We arrived at the enemy's stronghold, where a concentrate of small mob enemies were. Of course, with our present team, it wasn't really a problem.

"Are you alright, Master?"

"Yes, I am fine. But it's fishy...how the hell do they keep flowing here? It's like another one appear whenever we defeat one of them…"

"Master-san, perhaps is there a caster that makes them come here. We'll create an opening, so use it to go and defeat the caster."

"I understand. Okita, let's go."

"Yes!"

"Nobunaga-dono, if you please!"

"Leave it to me! Sanzen Sekai: Sandan Uchi!"

Thousand of rifles showed up and lined up in front, and they fired all at once, killing a lot of those mobs, and Okita and I rushed in the formation. The others tried to follow us, but the enemies quickly spawned in and blocked them.

"We'll join up later, don't worry about us! Defeat the bastard who's creating this singularity and take back the grail."

"Leave it to us!"

We rushed to the deepest part of the palace and finally arrived at the place where the bad guy was...however…

"Mu? Two of them slipped through huh...I see...quantity didn't win over quality. Fumu, I'll never make this mistake again."

A young woman with long white hair, tied back at either side with red tassels. A red and black dress bearing similarity to a short kimono and long European style coat, complete with high collar held closed by a rope tassel, and long stockings. She also shared facial features similar to Okita, though she was a bit bigger. She was holding onto a Japanese sword almost as long as her.

"Anyway...well done having made it this far. You guys however don't stand a chance against me alone. I am sorry, but this is the end for you. However, I would like to know your names beforehand. May I?"

"O...Okita Souji."

"Fumu...what a coincidence. And you are her Master, huh...I see...I am Majin Okita Souji…"

"Majin…?!"

"There's no way you are me, you fake!"

"I have barely any memories left of my life as Okita Souji so there are times when I can't tell if I'm really a copy of you...however, on a completely unrelated note, but somehow my height is taller and my breasts are bigger than you. I wonder if I'm in my growth period…"

What is she talking about…?

"Well, this chat is meaningless…prepare yourselves."

"Okita…"

"Yes?"

Okita was really troubled, so I had to give her hope.

"There's no way you can't win. That's why, fight on. I believe in you."

"...yes!"

However...the results...weren't as expected. Her alter self was way stronger than her, and we were...utter defeated. Reinforcements didn't come either…

"...I expected a bit more troubled coming from you two…"

Okita had one knee down on the ground, holding her sword upside down, using it as a support to not fall down. Wounds covered her entire body, and she coughed blood. Though she wasn't returning to the Throne, she was still in a very bad state.

"Mas...ter…"

"Well then...any last words?"

I couldn't mutter a world to her...so many thoughts were flowing in my head that I couldn't choose one. And in the end, without really thinking, I said…

"...sex…"

"Mu?"

"I...still didn't had sex with...Okita...that's why...I can't die here."

"Ma...Master?!"

"Sex...is it?"

Even Majin Okita was surprised by what I said, and I finally understood what I just said.

"…fumu...I'll allow it...I myself am a bit interested by this unknown thing. Should we move elsewhere? This place seems a bit inappropriate for it."

Majin-san sheathed her weapon and turned her back to us.

"Please follow me...I'll lead you to a better room for this."

Okita was still looking at me with wide open eyes, and I could understand why...I really uttered something stupid...yet, it still gave us...an opportunity…

We were guided to a simple room with a tatami covered floor and some traditional wooden walls. And she made signs to prepare a two person sized futon, which got here pretty quickly.

"Now, you can go on…"

"Wha-?!"

"Now, please hurry...I don't want to waste time, though…"

"E...even if you say that…"

Okita, thanks to having taken some time to recover by absorbing some of my mana, had no visible wound anymore. I looked at her, a bit embarrassed, as she too was.

"W...we're really doing it?"

"Well...we don't have...much choice…"

I took a look at Majin Okita, who sat and crossed her legs. I wonder if it was on purpose, but doing that added a sexy kind of feeling to the mature version of Okita.

"And besides...I always wanted...to do it with you, Okita…"

"Ma...Master…"

We both sat on the futon, with a bit of an awkward atmosphere going on. I know that we haven't much choices, but still...doing it while being watched, and knowing that it is during a losing battle…

"What are you waiting for?"

Majin-san was slowly turning impatient.

"Well, sorry but, this is not the kind of atmosphere needed for this sort of act."

She sighed and approached me, then took out something. A small bottle containing a purple liquid.

"Drink this."

Well...without waiting for an answer, she forced me to drink this.

"Master! Are you alright?"

After having made me drink without difficulty the potion, Majin took a bit of distance.

"What did you do to master?"

Majin showed the emptied bottle.

"It is just a strong aphrodisiac to put you two in the mood. Though...if not taken care of, it might give the victim a quite painful experience."

Just as she said that, I could feel my heartbeat rise up and my man's part becoming bigger, but once I thought that it couldn't get bigger, it started growing a bit more but...it was unbelievably painful. It felt like bursting at any moment. The bump it made on my pants by trying to free itself made Okita cover her eyes, though she was peeking through the gap obviously, red as a tomato and spouting small sounds like "awawa…".

"Here...now look at our Master's face. This thing might even kill him if it isn't sucked out. Is your Master's well-being not something important for you?"

"O...of course it is! But…"

I groaned from the pain it gave me and Okita looked at me worriedly, trying to decide what she should do before resolving herself.

"Master...it looks...very painful so...I'll take care of it."

"O...kita. Aouch…"

She tried to unzip the pants' zip but the bulge hastened the process, almost bursting it open and revealing the monster.

"I...isn't it a bit...too big?"

"Hoo? For something like that to turn this big, this has to do with the original size actually."

"It..it's not that big, right?"

But for the enemy to even praise it...yet, I kept groaning because of the pain and had only one eye opened while greeting my teeth, but as I glanced at It, I was surprised too. Is that thing really mine?! Will...Okita be okay?

-POV Okita-

"W...what should I...do?"

I really didn't know anything about it, so I touched it timidly and as I did so, it twitched. Master looked like in pain, so perhaps did I do it wrong. I try caressing the trunk and it twitched again.

"Guh…"

"Master, are you alright?"

"J...just now, the touch…it alleviated...the pain a little."

"I...I see…"

I started using one finger first...then two...three...then the whole hand and stroked it gently.

"Okita's...touch is...amazing."

"Master, please don't say that, it's embarrassing!"

There was one time, when I was still alive, where Kondo-san led me to a...brothel but...I only stayed outside and...sometimes, peeked by the window, and I saw how they did things in there. I leaned my face closer to Master's thing and licked the tip and I could feel it pulsate.

"Wait...Okita?!"

Somehow, the scent of it made me a bit feverish and Master's voice was somehow further away. Does it also have to do with the thing that fake me gave to Master? I slowly tried to enter everything in my mouth, but it was really big, and all of it couldn't fit in.

"Oki...your mouth...so warm…"

I kept going, since Master seemed pleased by it. I moved my mouth up and down, trying to keep it as much as possible in it. It was big enough to make me think that I felt like my jaw will dislocate and soon, after just a few minutes, Master pulsated repeatedly.

"Okita, I'm about to unload!"

Master didn't have that painful expression on his face, but a face cramped from pleasure.

"I'm...sorry!"

Suddenly grabbing the back of my head, he shoved the last part of his rod inside my mouth, which actually reached my throat, and unloaded thick spurts of something gooey in it. It kept being poured until finally, Master released his grip and I gasped for air.

"I'm sorry Okita...I was too rough…"

I kept trying to swallow everything that went in, but it was difficult, and the taste was weird. However, my fever kept increasing...I felt dizzy...I was hot down there.

"Ma...ster…please...more..."

I couldn't think straight anymore. I leaned over to him and kissed him, entwining our tongue together and Master, surprised at first, got along. We completely forgot about the enemy or our allies, and entrusted ourselves to carnal desires.

-POV Master-

Okita's innocence was gone, having her outfit half open by the situation. I could see that her chest, which was usually wrapped with a sarashi, making it seem smaller, was almost spilling out from her half-open outfit. I went to her back, stripped her and started massaging her breasts. Soft...and squishy...she had such a smooth skin it was unbelievable she went through battlefields. As I played with them, I started pinching the two small hills sticking out of her soft meat buns and even started sucking on them.

"Master looks like...a baby."

I used my free hand to start attacking also the place down there, and I saw that her lower half was already pretty sticky.

"Your nipples got erect too…"

"Attacking both places at the same time, it's unfair Master…"

I stopped playing the newborn child and switched to the lower mouth, notably playing with the clitoris using my tongue, making Okita jolt and hold a scream down.

"Wait, Master...doing that is."

I still played with her nipples and I could feel Okita was reaching the limit.

"Something is...coming!"

However, I stopped. Confused, Okita looked at me lifting her up and aligning both of our waist.

"...it's Okita's fault if I'm like this."

I lowered my waist, making the tip touch a warm entrance. Only by the touch of both our sensitive part made us jolt again, but I decided to further push my sword into her. The tip disappeared, following bit by bit by the trunk as it spread those fleshy walls of hers. Okita was groaning as my thing went deeper in her, and because I couldn't hold it in anymore, I thrust the rest of it in one go by forcibly lowering Okita's hips. As I did that, she let out a small squeal and I could feel her tighten like crazy, making me release another load.

"B...be gentle Master! It's...it's my first time, you know?!"

But she was like in a half-drunk state because of the pleasure, so it was all but convincing. I started thrusting in her. It was so warm and wet it felt like heaven. Perhaps because she cummed earlier, but it was very tight inside her and I kept playing with her breasts.

"Master, does it feel good in Okita?"

"The answer is none other than an absolute Yes...Okita, you're the best."

"I'm happy...to hear this from Master."

We kissed as we mated like wild beasts and we just couldn't stop. After many thrusts, Okita's lower mouth clamped on my thing and I filled her insides with my seed as Okita let out a sexy squeal. We separated a bit, but my thing was still rock hard.

"So...Master is still not satisfied, huh..."

Okita turned her back towards me and went on all four, lifting up her waist towards me.

"If Master is ready, then Okita is too…"

And then I saw...Majin-san coming towards us. I thought...it was for executing the both of us because she thought we actually "finished our business" but…she was actually lifting the hem of her dress, revealing actually no panties and a drooling lower mouth.

"You...take care of it. It is...aching like crazy."

"Were you...masturbating, watching us?"

"...just hurry up, please…"

Her figure and Okita's overlapped a bit in my mind, perhaps because they are the same person, though she is an alter ego of her (and an enemy), but that made my thing recover. I pinned Majin-san down and molested her breasts. It is true that they are bigger than Okita's, and I want to test these for a bit.

I freed her chest from her clothes and started sandwiching my meat rod in between her breasts. Well, she was surprised at first, but she just accepted it. I didn't know something like this could feel this amazing. Seeing it had some effect on me, she also used her mouth and sucked on the tip.

"Ish thish ghood like thish?"

"I...can't deny it. It feels amazing…"

I felt my thing swell up and becoming even bigger. Majin-san noticed and accelerated. Because I've already fired a load earlier, it was still pretty sensitive and I shot another one. My thing spit out things directly at her face, covering her with white goo. Majin-san picked up some on her finger and tried tasting it. So hot...she went on all four too and showed up her ass.

"Master, don't forget about Okita!"

Okita went next to her Alter ego and took a similar position. It was...a superb view. 2 Okitas were looking at me with feverish eyes and were begging me to do them. I could never have imagined having a threesome with 2 Okita's. But in the end, I shoved it on Majin-san first.

"Gnn...it's...tight."

I started pistoning her in doggy-style and Okita looked displeased, so I helped her a bit and used my fingers with her.

"Hnya?!"

She let out a cute scream as she felt the foreign object enter her and starting to move. As for Majin-san, I tried to move to where Okita's weak spots were and it seemed it was the same for her.

"H...How are you able to tell...all my weak spots?"

"As I thought, since you have the same origin, your body is not that much different. I can tell each of your weak spots."

I kept ramming her and I just couldn't stop. Each time I backed down, it felt like it was trying to suck me back in.

"Damn...you're so tight…"

"To think something like that would feel this good...my mind...is going blank."

"Hey, why not coming over to this side, then?"

"Huh? What are you talking about?"

"Instead of an enemy, why not trying to become our ally. In that way, we can do these kind of things as often as you want."

"Really? Ah...no, my mission is…"

"Become my woman."

"Huh?"

I could feel that she tightened up when I said that.

"I love all of Okita, and you are also Okita. That's why, become my woman."

"What...what kind of logic is that?"

"Then should I stop?"

Well, even if I wanted to, I just couldn't. I just lowered my speed a little and…

"D...don't stop!"

"I told you, become mine, Majin-san...no, Okita-san."

"Y...you're mean!"

I slowed down even more, and since I was more or less the one in control, she couldn't replace me. I know how bad what I was doing is, but...I wanted her, just as much as I want Okita.

"I understand...I...I'll be your servant, but please, keep going."

"Good, then let's begin the contract formation."

"Yes…"

Doing while having sex...would be unthinkable. Not undoable, unthinkable since how silly it sounds like. We were forming the contract while kissing, playing with her breasts, teasing her clitoris and still shoving repeatedly my meat rod in her lower entrance. My command seals shone faintly, marking the completion of the contract, and at the same time, we cummed together. Majin-san lost her strength and lied down on the futon and rolled on her back, panting.

"Master…"

Okita rode her and stuck out her waist to me again.

"It's Okita's turn now…"

"Yes, of course."

I entered her again and thrust her repeatedly again. Okita's moans was making my reasoning ability blow up and I put more strength. Her chest joined Majin's and she kissed her too. Majin's eyes opened wide, but she didn't resist and entwined her tongue with hers as they made hot french kisses.

"M...Master-san...me too…"

Majin stretched her entrance herself, asking me to put it in. Tempted, I did so and switched holes. Alternately mating between the two of them, we did so for more than two hours until the effect of the potion wore off. The both of them fainted as we were all panting, overly satisfied. I walked with the few energy left in me towards the grail and claimed it. With this, the singularity was corrected.

I woke up back in my room, in Chaldea, with a tingling sensation at my waist. Two big masses under my blanket were moving slowly too.

"Hey you, stop monopolizing it!"

"I am Master's servant. As his servant, it is my duty to take care of him."

I moved off the blanket and I saw both Okita's taking care of Sonny.

"Ah...good morning, Master…"

"See, you woke him up now. Mou...good morning, Master."

"Don't "good morning" me...what are you two doing?"

"Master said that if I joined you, you'd let me have sex with you as much as I want, right? I'm just claiming my reward."

I feel like my bond with Majin-san went up lightning fast...

"I...I was just trying to keep her in check, but she just wouldn't listen."

"This fellow's not pretty honest. She was also trying to sneak here."

"Okita did?"

Okita reddened and looked away, sulking timidly.

"W...well, isn't that what lovers does? That's what was written in the magazines under Master's bed."

Dammit! And I thought they were pretty well hidden.

"Now, Master…"

Majin crawled towards me and leaned her face close.

"Ready for round two?"

Directly after he woke up, they had sex until Mashu barged in.

-Epilogue-

"Finally, the flow of enemies has stopped."

Nobunaga, Hijikata, Sasaki and Ushiwakamaru finished off the last enemies remaining and finally advanced, but then, discovered the naked and fainted Master, Okita and a figure similar to Okita, but with brown skin and long white hair. Discovering the view, the boys had a nosebleed while the girls had complete reddened face and Nobunaga was seemingly angry and slightly envious.

"Wha-?! While we were fighting, those guys were having sex?!"

A small holographic window appeared near them.

"Senpai, congratulations on your-...wha?! Why is Master naked like this?!"

"It seemed...they enjoyed themselves while we were fighting, something like that…"

"Senpai! You'll have a serious talk with us once you wake up!"