My Vampire Little Sister

Future Jin stood over the defeated remains of Thanatos like the rightful victor of war. His feet were firmly lodged over the black cloth while he stared down unimpressed. Defeating Thanatos was said to be an impossible task. That was how the Goddess of Destiny had designed the Demon of Death.

Thanatos was immortal, with an incorporeal form and a power that could instantly kill all his foes. Even if every living creature on Earth banded together to deal with this threat, they would have been annihilated with no room to despair.

Yet, when Jin summoned his future self to possess his body, Thanatos was dispatched like one would play with a kid or a puppy. There was just no comparison between the two.

It was laughable to think that Thanatos even stood a chance after watching Jin's majestic display. All the time, the man didn't even unleash his full power. He played with Thanatos, and when he eventually got bored, future Jin annihilated the Demon with a single spell.

An apex Demon, a Demon that governed Death and caused problems for Jin just moments prior… Was now gone. As for the person responsible for Thanatos' death…

"How interesting; even though I've returned to the past, I'm able to use my powers. Time travel sure is a miraculous thing."

Future Jin was examining his own body with eyes of wonder. He touched his chest and hair, eventually creating a mirror to examine every nook and cranny of his body. Like a narcissist posing in front of a crowd, future Jin smiled and was lost in his own eyes.

"Regression? No, body possession? Wow, this does feel good! I'm living the dreams of a novel protagonist!"

Future Jin continued to ignore the defeated Thanatos and everyone who was staring at him with befuddlement. Matriarch Innocence, Sirius Moonreaver, Enzo Blackburn, Veralyn Shadowgarden and the Elven High Priestess… They were all nothing but ants in his eyes. However, some people caught his eye. Four to be exact.

"With the sideshow gone, we can continue with our reunion!"

Future Jin smiled as he approached the four dazzling brides on their wedding day.

"S-Sideshow?" Lilith muttered with apprehension.

"Yes, Thanatos has served his purpose in preserving the timeline." Future Jin explained with a mesmerising smile. "This whole charade was planned to complete the loop. To make sure I stay on track to gain my powers."

However, the gorgeous man's smile soon turned into a remorseful groan as he looked at the four girls with pity: "I'm sorry because we had to complete the time loop; the four of you have suffered. You were forced to rip your souls to save me that fateful day and sacrificed so much for my sake. Don't worry; you won't suffer anymore! I can guarantee that because I'm from the future!"

"W-W-Wait, my mind can't keep up!" Ysabelle yelled out with befuddlement. "W-What do you mean you're from the future?! And what is this time loop you're talking about?!"

Instead of answering the black-haired beauty's questions, future Jin shot the girl a warm gaze filled with love and joy.

"Ah, as expected… A flustered young Ysabelle is still the best to watch."

"Y-You! H-How are you still in the mood to tease?!"

"Haha, it has been two billion years since I saw your faces! Of course, I will tease you! Ah, I don't mean you guys aren't cute in the future! In fact, you will grow to be elegant beauties that are unrivalled in the Universe!"

"Y-You!!!"

Ysabelle's face turned completely beetroot as she couldn't handle future Jin's teasing. In the end, she shyly looked away while stealing glances at the exquisitely handsome man, who seemed to be a more mature version of the man she loved.

"J-Jin, if I can call you that."

"Of course you can, sweetheart." Future Jin smiled back at Lilith. "Even two billion years from now, you'll still be my Bloodmate. Well, we call it something else in the future, but that's unimportant."

"Y-Yeah…" Lilith did her best to restrain herself from exploding and composed herself to ask her questions.

"I-If you're really from the future, aren't you afraid of the butterfly effect?"

Lilith's concerns were valid. The butterfly effect was a widely known science fiction theory that should one person return in time to change the past; one action would demonstrably have bad effects on the future. Even a butterfly flapping its wings might cause a tornado that could wreck the lives of millions.

However, future Jin's response was far from being concerned.

"Ah, there's no need to worry about that."

"W-Why not?"

"You see, the butterfly effect only works when you're changing the past. But what's happening right now is the original and correct timeline. It was my destiny to be born to Jael and Elna Valter. It was my destiny to meet the four of you at that villa. It was my destiny to be mortally wounded by that Outer Demon. It was my destiny to turn into a Vampire. It was my destiny to become a Progenitor. And finally, it was my destiny to fight Thanatos and summon myself from the future."

"S-So you're saying… That everything was preordained?"

"That's right!"

"W-Who on Earth would have the power to do that?"

"Who else?"

Future Jin chuckled and pointed his index finger to himself.

"I was the one who planned everything. Well, future me, that is. Referencing your moment in time, I did it a billion years later? I altered time and destined fate to ensure the time loop was complete. Everything starting from the Genesis of the Universe to this very moment. I've planned it all."

"N-No way… This kind of Godly power… How is it possible?"

"It is possible. With my true power, that is."

"Your true power?"

Future Jin smiled and didn't give a straight answer. Instead, he gave Lilith an instruction.

"I can't tell you. It's something past me will have to figure out on his own. If I tell you now, it will be meaningless. But, there is something I want you to tell him… Think about what your Vampire Aspect really is."

"H-Huh?"

At that moment, Lilith finally realised. None of them truly knew the true nature of Jin's mysterious Vampire Aspect. In the beginning, they were intrigued by the unique Soul Armament and completely neglected identifying the Vampire Aspect. And as Jin grew exponentially, it almost didn't matter if they knew what his Vampire Aspect was.

"Okay! Now that all the boring stuff is out of the way…"

Future Jin let out a lascivious smile while raising both his hands. His fingers wiggled like worms while his tongue was sticking out like a starving beast.

"I've always wanted to relive my wedding night. Oh, the fun we had! I was the one who saved the day, so why should I let my past self enjoy the spoils of war? Hehe, don't worry, girls. I'll make sure to take you to heaven!"

The four girls were stunned by those words. If it was their Jin making those comments, they would have unquestionably jumped at the chance to bed him immediately. However, the man before them was future Jin, a man that had lived for two billion years.

Even though they had the same body and soul, they weren't the same Jin. So should they accept their husband's earnest request? And… With two billion years of experience behind him, the man was sure to bring them to places they didn't even know existed.

Gulping their throats, they were torn between accepting future Jin's request and staying loyal to their original Jin. Fortunately, they wouldn't need to make the choice.

"Fuck off…"

At that moment, a pained voice echoed out from future Jin's mouth.

"Y-You… You were awake?"

"I knew it… You were a bigger threat than the Demon!"

"Hey! You were the one who summoned me!"

Like a schizophrenic, Jin started talking to himself. While the future Jin was inhabiting his body, it didn't mean that the original Jin had disappeared. The original Jin stayed slumbering and waited for the best opportunity to wrest back control over his body. Although future Jin's power was infinitely more powerful, he was ultimately possessing someone else's body.

And the moment future Jin talked about sleeping with his wives, the original Jin woke up and attacked with a vengeance.

"I won't be NTRed! I won't be made a cuckold and let anyone else sleep with my wives! Even if it's by myself from the future!"

"F-Fuck! That's right, I remember now! I did the same thing in the past! Fucking hell, my love for my wives is too strong! To think that I could fight a Hegemon with that measly power!"

Like a sketch comedian, Jin had a fight with himself. The original Jin and future Jin argued endlessly as both of them attempted to obtain full control over the body, but eventually…

"Hah… Hah… Hah…"

Jin fell to his knees while panting and breaking out in cold sweat. The mysterious aura that suppressed anyone within his range had disappeared, and a familiar smile followed suit in its place.

"J-Jin? I-Is that you?"

"Hah… Hah… I knew that spell was dangerous."

Jin returned with a dazzling smile, like a general who had won a war single-handedly. And while watching his four wives gathered around him, he said:

"Finally… We can start our wedding night."