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My sister's Midori-kun

お姉ちゃんの翠くん

Sui is a third-year junior high student who can't stand her older sister's boyfriend, Midori-kun. He always teases her, treats her like a child, and makes fun of her, which annoys her to no end. She wishes he would just disappear from her life, but fate has other plans.

During the winter of her final year of junior high, Sui's mother asks Midori-kun to tutor her for the high school entrance exam. Forced to spend time with the one person she dislikes the most, Sui must endure his teasing while trying to focus on her studies. As they spend more time together, their relationship begins to shift in unexpected ways, and Sui starts to see a different side of Midori-kun that she never noticed before.

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