+18
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Onegai Sister+
おねがいシスター＋
Otoha discovers that her friend Kana is having a sexual relationship with her own brother. Shocked and intrigued, Otoha decides she wants the same for herself. She confronts Kana and demands to be included, threatening to expose the secret if her request is not granted.
Kana is forced to navigate the dangerous situation, trying to protect her relationship while dealing with Otoha's blackmail. The tension escalates as Otoha's demands become more insistent, putting everyone involved at risk.