I've always wanted to ask this question...why is the pamagat of this story "Another"? Wacky grammar? To make it madami interesting-sounding?

Well, in Class 3-3 after the incident 26 years ago, there was always an extra person. 'Another' is the pamagat to convey the fact that there was always ANOTHER person. It can also be used to say that there was a ANOTHER death amongst those related to Class 3-3.

another just means the surplus dead