Before Mr. Albert leave the school, he told EXOSHIDAE that he will be back...
This time round, Mr. Albert came back to ask EXOSHIDAE to be his agents.
They are on the top secret mission that involves a serial killer. They are to investigate who was that guy and what is his motive.
But EXOSHIDAE decided to take part in this mission.
It came out that there's a secret between the serial killer and EXOSHIDAE...