In a cafe not far from your apartment, you sit while watching people passing by through an open glass window that leads directly outside and into the cafe. Winter is here, according to the weather forecast, it will start snowing today. While enjoying the people passing by, your eyes catch the figure of a man who is familiar to you walking through an open glass window that reveals itself from inside the cafe. He then entered the cafe and sat in a place not far from you without noticing you.