"I loved my son as a man." Yusuke, a mother, goes to Tokyo once a month to take care of her apartment to attend college. However, as he goes through many times, his love for children eventually turns into a feeling for the opposite sex, and he makes a contract between men and women that must not be overcome. "I can't forgive this kind of relationship. If I don't meet for a while, I should be able to return to the parent and child like before, it's decided that it's good ... but that's really okay." It's more intense than this, and this month again ...