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Keikaku Doori?
けいかくどおり？
With their parents away for a few days, Onii-chan sees an opportunity to act on his feelings for his younger sister, Airi. He devises a plan to get closer to her, believing that this time alone will allow him to finally make his move.
As the siblings spend time together in the empty house, the boundaries of their relationship are tested. Onii-chan's intentions become increasingly clear, and Airi must decide how to respond to his advances. The situation escalates, leading to a tense and intimate encounter between them.
