Three Hoodies Save The World 2

Now they were intergalactic heroes, if only in their own minds. No monsters to fight; no worlds to save, and no one trying to kill them. So it's time to get down to the stuff that really matters to a teenager. That is, finding out what girls really are - that's human girls.
Except that it isn't over. Now someone bigger, badder and nastier is out to get them; and if they don't get it right, and quickly, then death would be infinitely preferable to the fate awaiting them.