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Mio is dissatisfied with her workaholic husband and their lack of sex at night. One day, a black man who has just moved into the same apartment building comes to greet her. As Mio teaches him about everyday life, such as the rules for taking out the trash, she becomes friends with him. Attracted by the man's gentlemanly demeanor, Mio and he end up having a physical relationship. However, knowing that they can't continue this kind of relationship forever, she tells the black man, "Let's break up."...