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Akogare no Onee-san ga Aniyome ni Natta
憧れのお姉さんが兄嫁になった
A young man has always admired his older neighbor, a kind and beautiful woman he looked up to since childhood. When his older brother announces that he will marry her, the protagonist's feelings of admiration turn into a complex mix of longing and jealousy. Now living under the same roof as his brother's new wife, he struggles to suppress his forbidden desires while trying to maintain a semblance of normalcy.
As the newlyweds settle into their life together, the protagonist finds himself increasingly drawn to his sister-in-law, whose gentle demeanor only intensifies his inner turmoil. The tension between his respect for his brother's marriage and his own hidden feelings creates a delicate and dangerous situation that threatens to unravel the family's harmony.