The detective is dead, I did it.

In an unscientific world, remember three key elements for being a detective: 1. The detective could never be the murderer. 2. A perfect crime is impossible. 3. Crimes involving superpowers should be solved by detectives with superpowers... [The weapon that killed the detective is now in the murderer's hand.] Li Ang stared at the message on the fruit knife in his hand, lost in thought. Then he looked at the detective, her eyes wide open in death: [Miss Charlotte, whom you murdered. But please remember, all sacrifices were worthwhile.] The detective died right at the start? And I did it?! This book is also known as "Please Stop Controlling Me, Detective," "Oh No! I'm Surrounded by Bad Women," and "Is the Detective a Good Girl?"