God-Level Killer, He Actually Killed Myself at the Beginning

Sitter is a top killer with special skills. He was recruited by the Space and Time Administration to carry out a top-secret mission. The content of the mission is to hunt down a mysterious person. After overcoming numerous difficulties, Sitter finally completed his mission. But when Sitter unveiled the mask of the mysterious man, he discovered that the man he killed looked exactly like himself! And the name of the man killed by Sit was also Site! The Space and Time Administration explained: "Yes, the person you killed is yourself! This is a multiverse world!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.