The story teaches the reasoning, brutality and actions of murderers in an educational way. Like how law students and police investigate cases.
Throughout the story, the relationship between Arisu and sensei is the same as a disciple and a master.
Sensei teaches Arisu how to kill (which she will in return use to kill sensei). The relationship between progress through the investigation of different murder cases (which they involve themselves with to teach Arisu how to kill) in which Arisu learns from.
Their relationship is one no one would suspect of.
Story: 9/10
Each murder is actually interesting and fun to read. Each chapter is intriguing and enjoyable. Both leads are not boring.
