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When my niece ``Misono'' wants pocket money, she comes to me, her uncle, to beg, and in return, she does naughty things to me. As if that wasn't enough, she also introduced me to her younger sister Rimu, and the two sisters started a naughty relationship for the sake of pocket money. Then, I ended up having a threesome with two people who wanted extra pocket money, and moreover, I ended up having sex that I had never had with two people before...