Became a Detective in a Daze

I was originally just an ordinary high school student who could get perfect scores in all subjects. Until I met a girl who wanted to commit suicide After I rescued her, she actually threatened me to form a detective team with her by saying, "If you save me, you will be responsible for me." Why does a 16-year-old girl dream of becoming a detective? Why does a 16-year-old girl get so excited when the murder case is mentioned and have all kinds of strange fantasies? Why is she still a hacker? The most critical question is, why is she usually so stupid? "Brother Xu Xing, tomorrow is Valentine's Day." "It has nothing to do with us." "How could it be? Brother Xu Xing, think about it. Many people will confess their feelings on Valentine's Day. If they fail or even see the girl they like with someone else, they might impulsively commit a murder case, murder, love murder, poisoning, etc. Don't our detective team have many commissions?" "..."