Miai, the mother who worries about her son who moved to Tokyo to attend university and goes to take care of him once a month. However, as she goes there many times, her love for her child eventually develops into a relationship between a man and a woman beyond family love. "There's no way this can be allowed for a parent and child. But the fact that I love that child is undeniable. What should I do..." While suffering from the conflict born from blood ties, Miai can't stop her body, which throbs with heat seeking her son, and decides to go to Tokyo again.