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Suki na Ko no Imouto

好きな子のいもうと

Yuka Amamiya has been in love with her classmate Nagisa Hanabusa for as long as she can remember. When she finally gathers the courage to confess, Nagisa turns her down, leaving Yuka heartbroken and unable to move on. Her lingering feelings consume her, and she struggles to let go of her first love.

Nagisa's younger sister, Mino-chan, who is also Yuka's friend, notices her pain and makes a surprising offer. She proposes that Yuka do with her everything she had wanted to do with Nagisa—dressing her up as her sister, going on dates, and more. Yuka hesitates but eventually gives in, seeing in Mino-chan the shadow of the person she still loves.

As Yuka indulges in her desires, she begins to spend more time with Mino-chan, who was supposed to be just a substitute. Gradually, she finds herself falling for the younger sister, complicating her feelings and blurring the lines between love and substitution.

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