I'm searching for some anime I have seen.. The trick is I don't remember what it was called.

All I remember some plot of that anime, so here is of what I could recollect...

Anime was about some filming scene of the teens (I think they were making some movie, school project) then some other group (?) was reviewing the movie that was shot to solve some mystery behind it. (don't remember what mystery was, maybe some death?)

Any ideas?

>gif unrelated ofc