Her husband was constantly away on business trips, leaving Kotori alone at home, enduring the loneliness while patiently putting up with his absence for his sake. One day, a man from the dry cleaning shop came by to deliver her husband's suit. After their usual small talk, he pulled a pristine business card from the inner pocket of the suit and revealed the woman's name written on it. In an instant, Kotori's heart was shaken—her husband's infidelity had been exposed. The dark shadow lurking beneath her everyday life had now become the greatest shock to ever strike her.