Kira's POV 🫧

After entering into the lighthouse lab, I sighed heavily to myself a little before walking over and sitting down at the couch, nearby the whiteboard Sada had written all over and showed no signs of having any intention on erasing them at all, sooner or later.

For a moment, I just stared at it, trying to process everything that's happened to mum, dad, and Miroko recently.

And when Sada came down with a nasty illness before that.

"Something's not adding up..." I thought to myself. "Even though Sada wasn't faking and lying to me about her illness, it just feels really...off.

Almost...

Almost like..."

Before I could finish that thought, I had already laid back on the couch and nodded off, taking myself a light nap.

~Dream (?)~

Opening my eyes and sitting up, before oddly finding myself in my room, the first thing I heard was the faint sound of giggling.

When I did, I recognized the giggling all too well.

"It's Sada's...But, why is she giggling?" I asked myself silently.

Getting out of bed, I walked over and moved the window curtain a little before peeking out, seeing her passing by my room without noticing, while the giggling continued.

After that happened, I moved away from the window and closed the curtain, silently heading my way over to the door and leaving the room, as I decided to follow Sada, curious on where she was going.

Just in advance for no reason in particular, I grabbed the Scarlet book off the bookshelf from her room, and quickly proceeded on following after Sada by getting in the air vent that was near me.

Much to my surprise however, the halls were dark, so it was kinda hard for me to see where Sada's going, while I'm busy navigating my way through the vents.

But, I still managed.

For what felt like several minutes or so, this continued on until Sada paused in front of a room. Door closed in front of her and everything.

"Why's she coming to an ordinary room like this one?" I asked myself in my head out of confusion as I watched.

"No...Wait...She's hiding something. Mostly from me. And I'm gonna find out whatever it is, whether she likes it or not. No matter what..."

Seeing her look left and right for a moment, before opening the door to the room in front of her, I silently got out of the vent and landed a few feet away behind her and from her hearing range.

Then I silently ran over and stopped behind Sada as she reached for the handle and opened the door.

Entering the room before flicking the lights on while I followed after her, I felt my face turn pale in shock when I saw what was in the room.

In the room, my parents and little sister were all tied up and separated from each other, all of them currently knocked out temporarily.

Mom was laying in the center of the room, while dad and Miroko were up against the wall by the right.

And by the left were the murder weapons.

An axe and a machete, just as I figured that's what it was that killed them. The only thing I didn't know and noticed was the fact a knife was there too.

"No...Don't tell me..." I began as I covered my mouth with my hand.

Unfortunately...It is what I thought it was.

Walking over to the counter, Sada picked up a knife and carried it in her left hand before she turned and started heading over to my little sister.

Groaning a little before sleepily blinking herself awake, Miroko looked around to the left and her right for a moment until her face quickly changed to fear.

"Huh?! Mom! Dad!!" She says as she squirmed a little in an attempt to move but with no avail.

"Oh good...You're awake. I was wondering whether or not you were gonna open your eyes." Sada began while she hid the knife behind her back, as she stopped herself from approaching more and just stood a few inches away from my little sister.

"P-Professor?!" Miroko went in disbelief as she looked up at her next.

"Hi. Nice to see you again..." She chuckled sinisterly.

"Wh-Wha? I don't understand...!?" My little sister began.

"Understand what?" I heard Sada ask innocently.

"This! All of this! Everything here in the room!" She answered, clearly afraid at this point.

In return, I just heard Sada laugh.

The very same laugh I heard before I went in the lighthouse lab.

"Oh, Miroko. If only you did understand... Especially as to why I'm doing this." She sighs after she stopped laughing.

"But, you don't...No worries though. I'll make it quick."

Knowing what was gonna happen next, as soon I saw her reveal the knife in front of Miroko, I immediately turned away and covered my ears in an attempt to block the sound out, before I heard stabbing and my sister screaming in pain and agony coming in.

For what felt like a few hours, this continued on until everything went silent.

Unfortunately, I didn't dare to peek in the room again.

The only thing I did see was the knife being tossed aside, before it was my parents' turn next.

When it happened again with my mother and father, all I could continue to do was try to block out the sound until everything went silent again.

Knowing I have to look at some point, I forced myself to, as I stood up and peeked in, seeing all of them dead, except for Sada.

Uncertain on what I should do, while I felt a little afraid, I brought out the Scarlet book I took earlier and threw it at the back of her head, successfully hitting her as I wanted it.

As I did, Sada just stood there for a solid good few seconds before she dropped the other two weapons and fell to her knees, clutching her head as she did so.

Not much to my surprise, she didn't turn around and notice the Scarlet book laying on the floor after that happened.

"Nnh...What...?" She went, making me immediately aware the tone in her voice had changed.

"Wait...Why is there - ?"

At this point, it only took her a few seconds to quickly figure things out.

"WHY IS THERE BLOOD ON MY HANDS?! AND WHY AM I COVERED IN IT?!?!"

When she looked up and spotted my parents and little sister's corpses, it didn't take long before she screamed in terror.

"No...No...NO!!!"

After saying that, she shook her head before clutching it again.

"You promised me you wouldn't take full control over my body and kill them! YOU PROMISED!" Sada continued as she let go and fell forward, her arms on the floor while she started to cry.

"How pitiful of you to even try trusting me...Did you really think I'd stick to my own promise that I made?" I heard someone speak, before I saw something emerge out of Sada's body, taking on a ghostly figure of herself.

"You lacked common sense at that moment when you made the decision to try trusting me...I'm disappointed in you, Sada."

When the figure stepped away and stood next to her, my face hardened as soon as I got a glimpse of the ghostly figure's face.

It was her inner demon.

"STILL! THAT DOESN'T GIVE YOU THE RIGHT TO TAKE CONTROL OVER ME AND MURDER THEM!!"

"Well, maybe next time, you'll think twice before asking me for consent in using me to protect that Kira bastard from anyone, in the near future.

You knew I was dangerous, yet you played the game of 'Dancing with Death' with me, and now look what happened.

I shouldn't take part of any blame you throw at me, when this is something you did by your own accord."

After saying that, ID Sada smirked before she slammed her foot onto her really hard, making her other half fall on her left side, and started kicking her.

"So much for a genius like you, huh? Oh, and by the way..." She began as she stopped kicking her other half for a moment.

"Excellent job on murdering Kira's parents...Seeing the sight of blood being spilt is wonderful to see and hearing the screams of someone's life being taken, until their last breath, is music to my ears."

Then ID Sada just laughed and slammed her foot onto her other half really hard, one last time, before she disappeared back into her body.

When she did, Sada just laid there, curled up into a ball a little, while she was both in pain and a crying mess.

"There's no point in denying it now...I'm a monster. I killed three innocent people, no matter how horrible they were to Kira in the past." She sobbed.

Seeing this, I immediately ran over and got down to her level, before attempting to hug, comfort and reassure her, only my body passed through her like a ghost.

"Wait...This isn't a dream at all...I'm inside a piece of Sada's memory." I thought to myself.

But the one thing I won't understand is, if this is a memory and I can't touch her, then why am I able to pick up the Scarlet book?

Before I could wake myself up, and figure that out later, I heard her say something for moment before I did...

"I'm sorry, Kira...I'm so sorry!! This is all my fault!"

Then I woke up.

Mao's POV 🐱

-Earlier-

After professor Sada pulled me into a hug, I was surprised at first for a moment before blushing a little, not expecting this, since I've never been hugged by another girl, other than my sister, Kira.

At the same time, it felt really nice.

"Who would've known girls could feel so warm and soft?" I thought to myself as I looked over at the professor a little before looking away.

While I was lost in my thoughts for a moment, I felt the professor part from hugging me before moving away a bit.

At first, I paid no attention to her, until I noticed something was wrong when I glanced over, seeing her laying down on the grass while she groaned softly a bit.

Worried, I wanted to ask her something, but she had already dozed off into a light nap before I could even say anything.

"For now, it'll have to wait...It's best that I should let her rest and see if she'll be okay when the professor wakes up." I thought to myself.

- - -

After a little while, she eventually woke up from her nap.

When she did, I looked over at her worriedly, before asking if she's alright.

Without sitting up, she only nodded in response.

"I-I'll...I'll be fine. It's just a sick spell." She managed to say before coughing violently a little.

"By a 'sick spell'...You mean something kinda like vertigo, for example?"

"Y-Yeah...That's what I meant. I'll just be laying here temporarily until it goes away."

"That cough you just made though...It doesn't sound like something you'd hear if someone just happened to have come down with vertigo recently...It sounds worse than that." I pointed out, while I grew even more worried.

"Mao...please..." The professor went before sighing heavily, sounding like she's growing a little frustrated.

"I-I'm sorry...I'm just worried about you and your health." I sighed before looking away, feeling a little ashamed.

For a moment, silence stretched between us, until Sada eventually broke it by speaking up.

"You really are like your elder sister, Mao...She's like this with me too.

She's worried about me frequently, but is always looking after me." I heard the professor begin, making me glance over and caught her slightly smirking to herself, while I noticed she calmed down a bit.

"Yeah. You're not wrong at all...I've been like that, since I was a baby." I smiled.

"I figured as much..." She chuckled softly.

"Also, I'm sorry for how I acted earlier just now...I was just...scared."

As she said that, I noticed her voice faltered before seeing her gaze soften and change slightly into fear.

"Scared? Why?" I went as I tilted my head to the side a little in confusion.

"Will you promise me not to tell your sister, Kira, until I either give you consent or tell her myself?" She asked.

"You're talking to the right person when it comes to keeping secrets..." I answered while nodding.

"Okay. Firstly, I have a little bit of what you call 'Lyssophobia'...There's another word for it too, which is 'Maniphobia'.

Try taking a guess on what the both of them mean, for a moment..." She began.

"I'm not really much of a genius like you and Kira are, but, I'll guess anyways." I replied before I started thinking.

After I said that, silence filled the air between us again for a moment.

"Uhm...This might sound like a really stupid guess, but...uh...fear of something to do with ropes? Or humanity?" I guessed before sweat dropping a little.

"Ehh....You're not even close. Nowhere even near it." She answered, while sweat dropping a little too.

"I'll give you a hint...It is part of what makes us human, but, it's the dark side of it."

"Yandere? Craziness?? Psycho???"

"Closer..."

"Mortality?"

"You almost got it..."

"Insanity?"

Just after I mentioned the word 'Insanity' that's when the professor didn't say a single word in response and just nodded.

"So, that's what those two words mean and is what you're a little scared of?" I asked.

"You're afraid of insanity? Or going insane?"

"Yes..." was all she silently answered.

Then Sada carefully sat herself up and turned to look at me, while she lightly grabbed the left sleeve of her lab coat.

"But...There's also this that I want you to keep as a secret too."

Silently inhaling and exhaling, while I noticed her hand was starting to tremble a little in fear, Sada closed her eyes and pushed her sleeve up and out of the way.

When she did, I felt my face turn pale.