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Sister × Act
しすたー×あくと
A young man named Kaito lives a quiet life until his long-lost childhood friend, a girl named Miu, suddenly reappears. Miu has changed drastically from the sweet girl he once knew, now possessing a bold and assertive personality. She moves into his home, bringing chaos and unexpected intimacy into his daily routine. Kaito finds himself caught between his memories of the past and the provocative new reality Miu presents.
As Miu's actions grow increasingly forward, Kaito struggles to understand her true intentions. The line between friendship and desire blurs, forcing him to confront feelings he never anticipated. Their rekindled relationship takes a turn that neither of them expected, leading to a single, intense encounter that will redefine their bond forever.