Cheap apartments in Tokyo are often built so close that you can almost reach the window of the property next door. I keep the curtains closed day and night, and the lights don't come on, so I don't have any sense of life in the room, so I guess they think it's an empty room, and many young kids these days tend to leave the curtains open without paying attention. Yes, I was waiting for that moment. I voyeured a real private person.