I havent dig too deep, but I think the extra person in all the years when the calamity happens is someone already related to the class 3-3.
Is it true?
I havent dig too deep, but I think the extra person in all the years when the calamity happens is someone already related to the class 3-3.
Is it true?
Yes, as far as I remember, this is confirmed at the beginning of the manga.
Class 3-3 has been the 'cursed' class since 1972
Every year since class 3-3 has had an 'Extra' person in the class from the original year, who doesn't realise they are already dead.
The Another Wikia is a good source of information on the series.