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Kyou kara Onee-chan!
今日からお姉ちゃん!
A young man finds himself in an unexpected situation when his older sister suddenly returns home after years of absence. She has changed dramatically, both in appearance and attitude, and now treats him with an unsettling mix of affection and authority. Their daily life takes a strange turn as she begins to act more like a caretaker than a sibling.
As the boundaries between family and forbidden desire blur, the brother struggles to understand his sister's true intentions. The tension between them grows, leading to a series of intimate encounters that challenge their relationship. What starts as a simple reunion quickly spirals into a taboo entanglement neither of them can escape.