You're a Killer, and You Got Perfect Marks in Psychological Counseling Classes?

[Killer + No Heroine + System] Yu Ke appears to be an ordinary college student, but is actually a top killer with the "Dark Night Dominator System", leading a sophisticated double life. But the psychological quality is so good! For convenience, he has lost count of how many code names he has. It doesn't matter, I, Ye Xiao, will always be the number one killer on the death list.