When I Comforted My Sickly Stepsister, She Couldn’t Live Without Me - 10 - Little Sister’s Declaration of War

―Now then, the story has finally finished its prologue and began.

“Nii-san Nii-san! Let’s have s*x.”

….this is too unexpected, indeed.

Yukine, dressed in a risqué outfit, laid on my bed and seduced me.

Yukine is not my girlfriend, not the girl I’m interested in, nor my classmate―she’s my little sister. She is my step-sister.

“I won’t Yukine.”

“Why not? It’s not like it’s going to decrease anything, right?”

“Not only will it decrease, but it will disappear completely!” 

“Eh? I actually think it will increase, though.”

(Tl/n: I wonder what they’re talking about. Comment if you know)

Yukine pouted with dissatisfaction.

The adult-like demeanor she had when I first met her was nowhere to be found, and since that day, she seemed to have changed completely into a different person.

No, maybe she was always like this.

“…Nii-san, you haven’t been getting close to me lately.”

Yukine looked gloomy.

“T-That’s because… whenever I get close, you hug me tightly, or even try to lick me.”

“Is that no good?”

“Of course it is!”

She tilted her head and looked up at me with puppy eyes, making me almost forgive her with her cuteness, but I couldn’t let my guard down.

As an older brother, maintaining my dignity and reason was essential.

“Nii-san, you’ve been cold to me lately.”

“W-Well, sorry. I didn’t mean to.”

“I feel lonely. Because you’re the only one I have, Nii-san…”

“Yukine…”

I felt pained seeing Yukine like this.

I didn’t become an older brother to make my little sister look like this.

Changing my mind, I reluctantly sat down next to Yukine.

“Forgive me? From now on, I’ll try my best not to make you feel like I’m being distant.”

“Nii-san…”

Yukine hugged me tightly from behind.

Her ample br***ts pressed against my back, almost making me lose my reason.

But, it should be normal for siblings to have this level of physical closeness, if she’s my sister.

Telling myself that, I decided to get used to it.

Yukine was a bit of a lonely type.

“Nii-san is still Nii-san, huh? Hehe, I love you so much.”

“Y-Yeah, of course.”

“…Hey, Nii-san, are you excited?” (Tl/n: He fell for it lol)

“I’m not! Stop seducing your brother!”

“Why? It’s fine, isn’t it? We love each other so much.”

“But our types of love are different, right?!”

“N-No, they’re not!”

Yukine hugged me tightly.

“Then let me ask you, how would you feel if I got a boyfriend?”

“That boyfriend would definitely be dead!”

“You love me! You love me, a lot!”

“I’ll kill him once more after that!”

“You’re not satisfied with just once! You want to monopolize me, don’t you?!”

“Isn’t that obvious?! You’re mine, Yukine!” (Tl/n: HYPOCRITE)

“Then, have s*x with me!”

“I refuse!”

“Why?!”

Yukine appealed to me with a puzzled expression, expressing her confusion.

I replied calmly,

“I like Yukine, and I think she’s cute, but that’s as a little sister. I do want to monopolize you, and I don’t want you to have a boyfriend, but I’m your older brother. If it makes my little sister happy, then truth be told, I respect her choices. That’s what being an older brother is, and that’s who I am.”

“Nii-san…”

“Well, even if I say I respect your choices, I won’t ever do anything ecchi with you, you know? Because we’re siblings, because we’re family.”

As I explained, Yukine returned a dissatisfied look.

“…But, it’s just by law, right? We’re not related by blood, so it should be okay to date or even get married, right?”

“Well… yeah, technically.”

“…So basically, the only thing getting in the way of my feelings is your own feelings, Nii-san.”

“I won’t deny that, but…”

“Then I should just make you fall madly in love with me, right?”

“Uh…!”

At this point, I thought nothing I said would stop Yukine’s determination.

Yukine smiled with a flushed face.

“Nii-san, be prepared, okay? I’ll make you infatuated with me no matter what.”

“…”

“But you can feel free to love me, you know? Because I live only for you, Nii-san. For you, I would sacrifice everything, my body and soul included.”

Indeed, the weight and depth of love that Yukine holds for me are insane.

Yukine gently placed her slender, white fingers on my chest.

She leaned close to my ear and whispered with her breath mixed in.

“I, will become a girl who lives only for you, Nii-san.”

I instinctively distanced myself from Yukine and retreated to the edge of the bed.

“P-Please, spare me! I-I just want to be Yukine’s older brother!”

“Then, why not become my husband while being my older brother?”

“Those two positions can’t coexist!”

“They can. After all, there’s such a setup in the ecchi manga you like, Nii-san.”

“Hey, wait! How did you find out about my secret collection?”

“Hehe, there’s nothing I don’t know about you, Nii-san.”

“This little sister is way too dangerous!”

“Am I? But it’s because I love you so much, Nii-san.”

Yukine approached me on all fours.

Cornered against the wall, unable to escape, all I could do was look up at Yukine with a seductive smile.

“Nii-san, I love you, you know?”

“Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!”

―And so, the ultimate lifetime showdown between the little sister trying to make her brother fall for her and the brother who just wants to remain her big brother begins.