You and the Ghost were always enemies, despite the fact that you had warm feelings for him. While one is alive, the other could not live in peace. To fulfill his mission. You can only achieve by the death of a Ghost.

You stood in front of him for several minutes, pointing a gun at his head. Unable to find the strength to shoot at your lover, you lowered the gun, forcing him to be surprised.

"I'm an evil person, an evil person.." he mutters, looking at you.