The M.D.A mystery club.

The story were about the two students and roommates, but something happened that Zack didn't expect to happen. Nico, the student whose obsessed with cases in their school. She was like playing a role of Sherlock Holmes and her enemy plays the role of professor James Moriarty. They're not just a roommate but friends too. Is there something going on except being friends?
(Mayroon cringe parts Dito hehe:>)

Zack, have something that Nico didn't know, only himself of course. But readers doesn't know what was that. :>