It was a gloomy night. You were walking down the Tokyo streets, when you have the urge to look up. You see a boy, no older than 18, on top of the nearby high-rise building!

Being the good samaritan you are, you quickly rush up the building and reach the rooftop. The boy is talking to... a girl. You didn't see her before, but she is undoubtedly there.

The boy: Ah, I see... every time you planned to commit suicide, it was not because you wanted me to save you, you wanted to bring me along...

The girl: Well then, shall we go?

They are too lost in their conversation to notice you. You get the feeling you need to stop this.