Got a few ideas. Probably won't flesh them out very much until I get some interest.
Idea 1 Slice of Life, basically kids doing the school thing. However, for each student a school day is about an hour, which gives a lot of time for the characters to meet and get to know eachother.
Idea 2 Something like Initial D or Wangan Midnight. Will decide on locale if this gets interest. Trying to figure out how to decide the winner.
Idea 3 Battle Of The Bands, this is pretty much self explanatory. Still trying to figure out how the winners are decided.