How does the Angel Beats special episode connect with the main storyline?


In the special episode (Stairway to Heaven), the Battlefront has decided to
commence a new mission: Operation High Tension Syndrome.

How is this story connected to the main timeline of the anime? Or do they have
completely different and unrelated stories? Is this special episode considered
canon?




The OVA is actually set between episodes 4 and 5 of the series. It's part of
the main timeline, but it doesn't really have any effect on the overarching
plot.

<http://en.wikipedia.org/wiki/List_of_Angel_Beats!_episodes>

