I'm the Only One Who Doesn't Know My Sister is My "Stepsister" ~The Beautiful Twin Sisters Want to Seduce Their Oblivious Brother~ - 7

Chapter 7: I Love You

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“I’m already feeling sleepy now. Is it alright if I turn off the lights now?”

“…Sure.”

The Stepsisters Meeting had come to an end, so Kairi could finally turn off the lights in our room. The Stepsisters Meeting was my idea. After seeing Kairi studying with Onii-chan in the living room when I returned home from cram school, I knew I had to confront Kairi about it. However, the fact that Kairi agreed to that match meant she liked Onii-chan just as much as I did. From this meeting, I came to know about Kairi’s true feelings and after I provoked her like that, she would surely be more desperate, at least for a while. But Kairi wasn’t the sharpest tool in the shed. In the end, she would only get on Onii-chan’s nerves when she became desperate. I could take my time, watching everything unfold. In a competition, the one who rushed out of desperation tended to lose. That was just how the world worked. Three minutes after the lights went out, I settled into my bed. I strained my ear and true enough, I could hear Kairi’s soft breathing coming from her side of the room. 

“Mmmh… O-Onii…”

Kairi was as stupid as ever. Though she inherited Mom’s beautiful gene, just like me, but her words were plain crude and the way she acted was so childish. She barely paid any attention in class and she always used her period as an excuse to skip PE class. She was a delinquent, so to say. There was no way someone like Kairi could become Onii-chan’s girlfriend. Onii-chan was far too dignified to have someone like Kairi as his girlfriend. 

No. I mustn’t let that happen. I couldn’t let Kairi become Onii-chan’s girlfriend. Onii-chan was what people would call a prodigy back when he was little. She was always kind to us and incredibly cool. Only someone like me, a hardworking honor student, was fit to stand by his side. I had been living my life with Onii-chan in my mind. I never strayed like Kairi did. In the first place, there was no way a gyaru like Kairi could get into Shugakuin High School. That school was famous for having a high academic standard. Kairi would definitely fail the entrance test and had to attend a different school from Onii-chan. When that time came, I could have Onii-chan all to myself. We could walk together to school, eat lunch together and hang out together after school. 

“In other words, victory is already in my hands…”

I was pretty much guaranteed to win the match I had just proposed to Kairi. Marriage with Onii-chan wouldn’t be a far-fetched dream either. Besides, the reason why I proposed that match during the Stepsisters Meeting wasn’t just out of consideration of Onii-chan’s trauma with women. I had another ulterior motive. That was to instill a certain mindset in Onii-chan’s mind. I wanted him to start thinking “I guess liking my little sister won’t be that bad.” Sure, Onii-chan was obsessed with those 2D girls right now, but in due time, I could slowly distort his sense of ethics. “Other women are impossible for me, but maybe if it’s my little sister….” I wanted him to start having those forbidden thoughts.

After that, once Onii-chan fell head over heels for me, I would let him struggle a little. He would be left frustrated. Even though I was this close to him, but he couldn’t touch me because of the forbidden nature in our relationship. When he was feeling frustrated at himself, I would tell him the truth. “Actually, I’m your stepsister.” Onii-chan, who had been left hanging for so long, would definitely be ready to burst.♡ He would get super excited. All the pent-up frustration and desires would explode upon learning the shocking truth.♡

“Who would’ve thought Yuuri is actually my stepsister. In that case, I don’t need to hold back! Yuuri!!”

And then, Onii-chan would climb on top of me as I lay ready in bed. It would feel great for sure… The greatest pleasure in the world would finally fall into my hand. Just imagining doing naughty things with Onii-chan was enough to make my body throbbing with desire. I unconsciously started reaching for a certain part of my body. The part that kept on tingling. 

“Soon enough, Onii-chan will be mine and mine alone.♡”

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