Jitsu wa Imouto Deshita

Synopsis:

A covert relationship between his younger sister and his younger brother!? A sibling misunderstanding leads to a romantic comedy! My parents remarried when I was in high school, and I was introduced to my stepbrother, Akira. Due to the complex home setting he grew up in, he is a shy but adorable youngster. I always spent time playing with Akira since I had a thing for my brother. He adores me. We clicked, and the gap between us quickly widened! "......Brother, do you like me by any chance?" I asked him. "I do, of course." We continue to misunderstand one another. And at last, I became perplexed when I recognized that Akira was my "sister"... "My brother and I have always been apart, and I like that. I would rather be with you than where I am right now. With the intention of turning us into "lovers" rather than "siblings," Akira has started to approach me! With a younger sister who is too adorable and carefree to be a brother, this romantic comedy is flirty!