酷酷的代课老师

I don't want to be a teacher and my dream is to be a reasoning novelist. I don't expect to win students' love or want to preach to them. However, I'm very serious in teaching. I'm such an upright man. Oddly enough, students love me and don't want me to leave. They say that I'm a good teacher and some of them even cry when I leave. Once, I serve as a substitute teacher in grade 5, class 2 in a primary school. Unexpectedly, a murder occurs the next day! So I solve the case as removing doubt is my style.