Somewhere in the outskirts of Tokyo.
In a quiet neighborhood right by the edge of the city, a normal-looking house stood, overshadowed by the same normal houses that surrounded it. However, this house served a low-profile purpose, and no one was aware of it.
From time to time, a car would roll in front of the house, carrying three passengers. One lady and two men. A burly man with tanned skin would then open the front door for the three of them, and they will have a nice long chat, catching up with each other. When nighttime rolls down, the three passengers would then exit the house, and say goodbye to the tanned burly man who would see them off before they go.