How I imagine the trailer to go down:
"An infamous f**kboy"
   - Clips of Nathaniel Buzolic with girls/kissing/dancing/hugging
"An unknown diary"
   - Clip of a girl writing in a notebook (don't show her face)
"A mysterious write"
   - A girl running away/Silhouette of a girl (again, don't show her face)
"And a handful of potential suspects"
   - This is where it gets a little complicated, because I want you to flash clips of the girls that I had listed down as "Potential Suspects" in the clips compilation. Just really fast clips of each of the girls. Like how you flashed clips of the girls in your Senior Year trailer.

The rest of the trailer is up to you on how you envision it, but maybe include typical high school clips, teenagers having fun, and other teen fic/humor-ish clips that you can think of.

MUSIC SUGGESTIONS:
Shape of You - Ed Sheeran
Treasure - Bruno Mars