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Wataru is what people call a hikikomori, who has been squandering his university entrance exams. My father, who couldn't see it, asked a friend's wife, Yu, who used to be a tutor, to be a tutor. Yuu agrees and teaches her to study, but Wataru is completely unmotivated and worries. Thinking about how to concentrate on studying, Yu uses his proud nice body to set up a naughty strategy with every hand.