Nazotoki Drill
謎解きドリル
A 19-year-old high school student, currently in her third year of repeating the final grade, frequently encounters murders and eagerly presents herself as a detective. She refers to a classmate as her assistant, though the girl is neither an assistant nor a close friend. The classmate demonstrates greater skill in solving the mysteries. The first murder in the series occurs during a school trip, when a maid discovers a man fatally stabbed in a hotel room.