Karen, a single mother who moves into the apartment next to the one where I live alone, and I start talking by chance. The lonely student from the countryside with no friends in Tokyo and Karen, a single mother with no one to rely on, are drawn to each other. As our distance closes, we eventually become intimate. However, the presence of Karen's ex-husband threatens the lives of the two of us and the child. For the sake of my own happiness and that of Karen and her child...