I'm challenging all the writers out there to try and write about these topics. I really want to read what you think happened so please tell me if you're going to post so I can read them. This will be updated if I can think of any more. (All these kind of center around Akira since he's my favorite!) There are a LOT to choose from.
How Suoh and Nokoru met Akira
What happens when Suoh and Nokoru find out Akira is Twenty Masks
Suoh and Nokoru overhear Akira yelling at someone on the phone
The three (Nokoru, Suoh and Akira) switch roles for one day (Akira as Suoh, Suoh as Nokoru and Nokoru as Akira or different way around)
The three switch bodies and must live as each other until they switch back
Suoh and Nokoru walk in on Akira arguing with Twenty Masks
The detectives get thrown into an alternate universe where Akira is a dangerous criminal and wanted in every country in the world; Suoh is always scared and weak; Nokoru is dumb, poor and always bored. Basically they meet their opposite personalities.
Suoh and Nokoru find a journal that holds Akira's real thoughts and they read it (Akira doesn't know they found it)
The police find out Akira is Twenty Masks and arrests him during school hours
Suoh and Nokoru enter Akira in a singing contest as a joke but still make him do it
Akira gets really mad and blows up at Suoh and Nokoru for the first time
Akira stops cooking and takes up drawing instead
A strange woman shows up and leaves her child with Suoh, Nokoru and Akira
Akira is about to go on vacation when he's kidnapped and nobody notices until months later
Suoh takes a day off and leaves Akira in charge with the responsibility of making sure Nokoru gets all his work done and is safe but Nokoru is kidnapped, Akira must save him and Suoh can never know.
Suoh and Nokoru want to know one thing. Is Akira even able to get mad? (Somewhat the same as before yet different)
The three detectives have a new mission from their parents. GET A JOB. Can they pull this off or will they finally fail to be able to solve the mistries of the real world?
The three detectives have each been given a different child to take care of for one month. They are allowed no help and if they fail to meet the requirments, they must leave the school. Who would make such a bet? Nokoru agreed to it after someone accused him of not being able to take care of a child. (Read: They tricked him into making him, Suoh and Akira babysit while they go on vacation) (They are all in high school at this point)
Crossover with PoT: Akira si visiting his mothers older sister (Rinko Echizen) and staying with them for one year. (Make up whatever reason you want to). Nokoru decided it would be fun if he and Suoh came along for the ride as well so now they are all staying with the Echizen family and are going to Seigaku High for one year with Ryoma and the regulars. What could possibly happen?