Chapter 13 – Multitasking Is Hard……

My body feels somewhat hot. But it doesn’t feel like I’m actually sick.

“……Aku-nee. You spiked the cocoa again, didn’t you!”

“Nn~? I have no idea what you’re talking about……”

Yes, again. The current state is extremely similar to the time she drugged me with an aphrodisiac before. Back then I barely managed to suppress my desires with reason and nothing major happened, but there’s no guarantee it’ll go well this time too.

I’ll say it again: Aku-nee understands very well both my outwardly serious side and the fact that a ‘beast’ lurks inside me. She also knows that this contradictory state holds the key to bringing me down.

In other words, if she can make me unleash my warped, filthy desires onto her, then after I calm down I’ll definitely feel responsible and agree to make her my official girlfriend. She’s surely convinced of this and has built her strategy around that chart.

In fact, this method is extremely close to being correct. Precisely because she’s been with me literally since the moment I was born, she can take such a bold approach. If I were the kind of guy who could just fuck and dump someone without a care, this strategy would fall apart. As expected of my stepsister, blood-related or not.

“Hakuto-chan, false accusations are bad, you know. Do you have any physical evidence~?”

Aku-nee says this with a straight face, then deliberately spreads her legs into an M-shaped position. Because she’s wearing a mini-skirt, her black panties — the matching set she flashed this morning — are completely visible.

“Cheap provocation……”

“Fufu. I’m so defenseless like this, you know~? If you want to rip my clothes off right now, I won’t complain~? Mom and Dad aren’t home either, so now’s your chance to attack~?”

“No no! If we actually do it, there’ll be no going back! I’ll definitely end up making Aku-nee cry! I don’t want to destroy this current relationship we have!”

“I want you to destroy it! I don’t want to be Hakuto-chan’s big sister anymore, I want to be your lover!”

It turns into the usual circular argument, but right now Aku-nee holds the initiative.

“Toooi!”

From her current M-shaped sitting position, she leaps at me with both arms and legs, locking me in tightly so I can’t escape. The so-called daishuki hold. Or a modified EZ-8 Gundam.

“……Calm down, me. What’s in front of me right now is a clinging EZ-8. Not Aku-nee’s soft body…… It’s an EZ-8 that’s about to self-destruct by clinging onto me……”

“How far are you going to take that self-suggestion……?”

Aku-nee says this while looking at me with a grin. I try to distract myself by shifting my gaze to the screen.

It was exactly the scene where the protagonists’ motherships were about to collide while passing each other.

“……The helmsman of the Archangel is definitely weird.”

“Well, that’s because the guy who later dodges Requiem is steering…… Wait, no! Look at me!”

Aku-nee, who had been drawn to the screen, agrees with me before turning her gaze back.

“I’ll kiss you like this! Not a cute one, but an extremely lewd one!”

“Stop it, my rationality is melting!”

“I’m going to melt it. So you can touch me without hesitation.”

Saying that, Aku-nee leaned in for a deep kiss. I shake my head, resisting. If I accept the kiss, my reason really won’t hold.

Meanwhile on the screen, the protagonists’ one-on-one battle had just begun. Aku-nee’s attention is momentarily pulled toward it. I also glance over.

“Wow~ What an amazing fight. He’s completely mastered the Impulse.”

“Shinn-chan at this time is fully in mad dog mode.”

“Because it was so good at this point, the later misfortune of the Destiny stands out even more, or rather, I’m glad the movie let it show its true potential…… Wait, no!”

Aku-nee pushes me down, looking slightly angry.

“Stop looking at the screen! Look at me!”

“Let go, let go.”

“I won’t let go. Today I’m finally going to have Hakuto-chan’s Excalibur thrust into my Freedom Gundam!”

“That analogy is way too bad……”

Just as Aku-nee reached for my pants…… on the screen, the Impulse’s Excalibur pierced straight into the Freedom.

“Ooh~”

We both let out the same sound. As expected, you really shouldn’t try to do lewd things while watching your favorite anime. Your concentration doesn’t last.

Chapter 14 – Cross the Rubicon

“……Should we stop for a moment?”

Aku-nee picks up the TV remote and moves to press the pause button.

“Wait, Aku-nee. The next episode is the Destiny debut, you know?”

“I’m not waiting. I want Hakuto-chan to hold me already! I want you to cross the line! I want you to cross the Rubicon! As long as this is on, both of us keep getting distracted!”

Saying that, Aku-nee presses the pause button. It seems impossible to distract myself with the TV anymore.

“Haha. The Rubicon Operation, huh?”

“It’s still a bit early for Christmas…… Anyway, I’ve made up my mind too. No matter how much you hate it, I’m going to do terrible things to you, Hakuto-chan!”

With that, she forcibly kisses me.

“~!”

And it’s a deep, intense one with our tongues intertwining. Ah, this is bad. I can hear my rationality melting. My head fills completely with the desire to defile the girl in front of me.

Truly terrifying is the power of drugs. It’s fine for me since I’m constantly being trained by Aku-nee drugging me, but all you readers in front of the screen — don’t abuse substances!

“……”

“Kyaa!?”

I forcibly push Aku-nee down, then kiss her from my side this time.

“Today I’m going to make you take all of my desires. It’s your fault, Aku-nee, so no matter how much you scream and cry, I won’t stop.”

“……Aha! Hakuto-chan, you’re finally getting serious!”

I pull away from Aku-nee for a moment, then use zip ties — not the music band, okay? — to bind her wrists and ankles, gag her with a towel, and climb on top of her again.

“Don’t run away, okay? No matter how much you scream, I won’t stop anymore.”

“~~~! (Aahn♡ Aggressive Hakuto-chan is wonderful too!)”

“It’s your fault, Aku-nee. It’s all because you kept provoking me with such cheap moves!”

I’ve completely entered a rampage state. The only thing left in my head now is the dark desire to mess up and destroy the defenseless girl before me.

To be continued in Nocturne!

And then, fufufu…… it was going to turn into a full-blown S○X scene! That’s what a lot of people probably thought.

Well, just as I was about to rip her clothes off, the doorbell rang at the perfect timing.

“……Who is it? At a time like this.”

At first I thought about pretending no one was home. But it kept ringing, so I reluctantly went to check the monitor linked to the doorbell.

“?!”

Standing there was, surprisingly, Midori-neechan. The fact that she has the spare key to our house immediately flashed through my mind.

This is bad. This situation is seriously bad. My head rapidly clears up.

From an outsider’s perspective, this looks exactly like the moment right before I was about to rape Aku-nee. Of course Midori-neechan would tell my parents, and then it would become “You’re going to take responsibility for ruining our daughter, right?” Our parents treat Aku-nee as their real daughter. Even if the culprit is their biological son, they’d still make him take responsibility.

No, that part itself is fine, but I really don’t want the relationship with my parents to become awkward.

At this point, my head cooled down rapidly. Without a word, I grab some scissors and cut the zip ties on Aku-nee. After removing the gag, I unpause the TV.

“Huh? Eh? Why why? We were clearly about to do it just now.”

“Just sit on the sofa!”

Right after I finish handling everything, Midori-neechan opens the front door with her spare key and comes in.

“Nephew and niece~ It’s Midori-neechan’s grand entrance~. ……What’s this, both of you are breathing so heavily.”

“Hahaha……”

Midori-neechan walks in as if it’s her own house and looks at us with a suspicious expression.