StepSister Wants To Make A Fait Accompli

“Welcome back! Onii-chan!”

“I’m home, Yumi.”

After returning home from school, Yumi greeted me at the door instead of pretending to be asleep like usual. We started having dinner together in the living room.

Suddenly, I remembered something Mishizuku had told me before, something I hadn’t acted upon yet. So, I decided to bring it up with Yumi.

“Who do you like, Yuumi?”

“Huh? Why are you suddenly asking? Obviously, it’s you, Onii-chan!”

“Alright, let me rephrase the question, Yumi. How many men are there in this world?”

“Well, I don’t know the exact number, but roughly about half of the total population, right?”

“Exactly. So, it means there are many other men in this world besides me.” 

――That’s it. This was the approach Mishizuku had suggested, filling in the gaps in Yumi’s thinking.

Right now, Yumi only sees me, the closest opposite sex person to her… So, I need to teach her that there are many other men in this world.

As Mishizuku had suggested, even though it seemed like common sense, it must be necessary for Yumi, and it’s my duty as her older brother to convey it.

… I was thinking that, but Yumi looked at me with a blank expression and said,

“I already know that. What are you trying to say, Onii-chan?”

“Well, the point is, Yumi might think she wants to marry me because I’m the closest opposite sex person to her, but if she sees a wider world, she’ll realize there are more options than just me.”

“…So, if I see more guys, there’s a possibility I might like someone other than you?”

“That’s right.”

When I said that, Yuumi lowered her head for a moment.

…I briefly felt like I might have stepped on something I shouldn’t have, but when Yumi raised her head again, her expression was calm, showing no signs of such a feeling.

Then, Yumi spoke up,

“… Onii-chan, this is something that concerns our future, so can we talk on the couch before dinner?”

“… Yeah.”

It seems like she’s willing to listen to what I have to say.

This might be the first time Yumi has been so attentive to me regarding such matters. Thank you, Mishizuku… From here on out, I’ll fulfill my duty as her older brother.

As I rose from the chair by the dinner table, Yumi and I sat together on the couch.

“Yumi, changing all your thoughts at once might be difficult, so let’s talk now and slowly work through it together…”

As I began to assist Yumi in changing her mindset, she suddenly stood up, then pushed me down onto the vacant space on the couch where she had been sitting moments before. 

She straddled me, effectively pinning me down.

“…Huh? What’s going on?”

Confused by the sudden turn of events, I couldn’t quite grasp what was happening, but I could affirm that Yuumi was now straddling me.

“Y-Yumi? What are you trying to do?”

“I want to know, Onii-chan, what do you mean?”

“I was just, as a b-brother—”

“What you did is trampling on my feelings for you, onii-chan… Even though I love you so much, you’re dismissing it with such a cheap excuse that you’re just the closest boy to me, suggesting that I should look elsewhere for love, right?”

“N-No, it’s not like that, I didn’t mean it that way—”

“Don’t worry, onii-chan. I know better than anyone that you’re a kind person who wouldn’t say such things… Surely, you just haven’t realized how much I love you yet… So, I’m going to teach you right now.”

With that, Yuumi swiftly unbuttoned her school blazer.

“Yumi? What is the meaning of this?”

“I will, to onii-chan, show him firsthand how much I truly love him……..If I create a fait accompli now, it’ll be easier to do lots of things, so this is a good opportunity.”

Saying so, Yumi had a bewitching smile on her face, with flushed cheeks.