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

Well, in Class 3-3 after the incident 26 years ago, there was always an extra person. 'Another' is the titre 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