What Do You Mean My Cute Disciples Are Yanderes?

(MC POV)

Let's see, how far can I actually push this?

??

"Hey Tsuki?" I called out in the middle of our dinner.

"Hmm? What is it, Nii-chan?"

"Do you believe in magic?"

She spooned a mouthful of rice into her mouth and munched on it delicately, "Mmm… Like those magic tricks in magic shows?"

"No, like the isekai animes we watch kind of magic."

"Eh? Like getting a system that gives you rewards for completing quests? Ehehehe~ Did Nii-chan find a good anime for us to watch again? Or did Nii-chan suddenly get a system?"

I was about to correct her when an idea hit me.

I smirked at her, "What if I told you… I really did get a system?"

I thought Tsuki might start laughing thinking it's a joke but instead, she gasped and looked at me with wide eyes.

"Did Nii-chan really get one?! That's so cool! What are your quests?"

I raised an eyebrow at her, "You're not going to question it? You actually think I got one just because I told you?"

"Of course! I always knew Nii-chan was special after all! Even today's curry, it's so much more delicious than the one Nii-chan made before! Nii-chan must have used your system to make it right? Maybe you added levels to your cooking?"

Ah, that must be my experience with cooking in the other world coming into play. I think…

Still, for Tsuki to trust me so unconditionally, it really shows how close we must be here.

Now I'm wondering… I basically got sucked into this memory and can't find a way to get out right? In that case, if I were to divert the present as far away from the supposed future as possible, I should be able to theoretically collapse this reality and return to my own right?

Does it even work that way though?

But if it really does, the real question is… How far can I go without outright ripping this reality apart with myself inside and perish along with it?

Guess there's only one way to find out.

I looked Tsuki dead in the eye and said, "Tsuki… I'm from the future."

She blinked at me twice before her face brightened up, "Really?! That's so cool, Nii-chan! What was it like?! Did Nii-chan's business project succeed? Oh, who did Nii-chan marry? Is it big sister Yumi? Are we still living together? Please say we're still living together!"

Wow, she's… Really trusting of me...

I raised up my hand, "Ok, calm down now. Let me answer this slowly. Yes, my business project did succeed, no I did not marry, yes we were still living together. The sad news is that I was assassinated by someone a few years down the road and lost my life because of it."

Tsuki blinked again, slightly longer this time as she tried to process what I said.

"Nii-chan… Was assassinated?"

I nodded, "And I was sent back here. That's why you caught me spacing out while I was making curry."

"I… I see…"

It seems like the news about me dying came as a pretty big shock to Tsuki, even more shocking than the fact I came from the future it seems.

She looked up at me, tears almost spilling out from the corners of her eyes, "Will… Will Nii-chan leave me this time again?"

Ah… That's what she's worried about.

The fact that our birth parents abandoned us from young must have been quite traumatic for her to the point she's deathly afraid that I would leave her as well. Even though she probably wouldn't even remember how her parents looked like, the fact that she was abandoned was something she's still conscious of.

I reached out and patted her head, "Don't worry, this time I will stay with you no matter what."

"Really? Really, really? Nii-chan won't leave me here alone right? I won't be alone will I?"

"No, you won't be alone this time, Tsuki."

Tsuki clambered out from her seat and crawled under the table towards me, surprising me.

She climbed towards me and sat herself on my lap, tears starting to mar her face as she clung on to me.

"Don't leave me Nii-chan… Please don't leave me… I don't want anyone else but Nii-chan…"

I patted her gently and hugged her close, soothing her with gentle words.

"It's ok, it's ok. Don't cry. It's ok, I'm not leaving you. Look here, I can do this now, Tsuki."

I pointed my finger in front of me and made a small ball of light appear, letting it fly around us.

Tsuki sniffled and watched the light show for a bit, managing to calm herself down.

"It's magic… Guhihihi~" She giggled. "Nii-chan is a magician now."

"Haha, yes I am. So there's no one that can hurt your Nii-chan or take me away from you now."

"Nii-chan…"

We held each other for a while in silence, just enjoying each other's warmth.

Tsuki pulled away from me slowly, "I'm sorry Nii-chan… I was a bit emotional…"

"No need to apologize for that. You are my cute little sister after all."

"Guhihihi~ Nii-chan called me cute~"

Yep, she's really, really cute.

She got off of me and went back to her seat, unfortunately our dinner was already cold by now.

"I'll heat up the food for us," Tsuki offered, reaching out to pick up my plate.

I shook my head, "No need to, just let me do it."

Waving my hands over the food in front of us, I manipulated the fire quarks in the air to heat up the food instantaneously, making it almost like they were freshly brought out from the stove.

Tsuki's eyes sparkled, "Wooooow! Nii-chan is awesome! Is that your system's ability?"

"It sure is, shall we eat?"

We resumed our dinner, Tsuki eating the food with relish and cleaning her plate of food in a matter of minutes.

After clearing the table and dishes, Tsuki and I went into the bath for our usual bathing session. It seems that even now, we're still bathing together as brother and sister.

Tsuki sat in front with her back leaning against me while we soaked in the bathtub, the tub just big enough to fit the two of us.

"So… Is there anything you want me to do? I'm sure my system can do something for you. Better grades at school? Some bully you want taken care of? Maybe a teacher you want to play a prank on? Anything you want I can give you."

Tsuki turned to look at me, her eyes sparkling in the light, "Anything, Nii-chan?"

I nodded with a smile.

She turned back and poked her fingers together, "Ummm… In that case… Can Nii-chan… Make my breasts bigger?"

…

…

Why did I not see that coming?

Well it's not exactly that hard to do so I just helped her with it. Does the real Tsuki wish for this as well? I suppose I should ask her when I get back.

"Waaah! It really got bigger!! Thank you Nii-chan!! You're the best!!! I love you!!" She screamed out in joy, hugging me tightly.

"Ok, ok, calm down. We're still in the bath."

"Ehehehe~ I'm just so happy~ Nii-chan really is the best!!"

I smiled wryly at the giggling girl that was admiring her own breasts.

I leaned back in the bath and immersed myself in my own thoughts for a moment.

There was no big threat here, no Dark Sect, no Gods, no cultivators and any gangsters threatening me can be easily dealt with using my powers.

I grinned, "You know… Maybe staying here for a while isn't that bad."

Yeah… Let's just stay here for just a bit.

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