Reveal a murder case!!

A school girl was murdered near Shinsekai and the suspect is still around. As a undercover detective, you will play a role as a school girl and get any information from her friends.
Even you a detective, you have to go to school and study like an ordinary student to protect your original identity. You also have to find additional information in the crime scene. but be carefull because there a lot of gangsters which they can hurt you. Do not be rude to the citizen, school student or the gangster because they can fight you. Make sure you choose a proper question while you interrogate someone!!

Solve the murderer case of the girl and arrest the culprit!!!