My high school chemistry teacher is a master's student. With his keen observation skills and reasoning, he has solved many cases in his daily teaching life. Although there is no murder case that shocks the society, there is no idol baggage for the protagonist, and there is no distinctive assistant or companion in the campus theme, but my teacher did solve many problems through thinking. The author is honored to record these and share them with everyone. Let's study this ordinary graduate student in chemistry together!