Another

The series opens in 1998 with a boy in the hospital.  As his father is working overseas, Kouichi was sent to live with his grandparents and aunt.  While in the hospital, he is visited by several students from the middle school where he will be a mid-year transfer student.  The meeting is awkward and there is clearly more to it than the students reveal.  Later, when Kouichi is being released, he runs into yet another student.  She has an eye patch and is carrying a doll.  There is something quite peculiar about the girl, especially when she gets off the elevator and heads to the morgue!  Kouichi finally begins class and notices that the one-eyed girl seems to be invisible to everyone else.  Is she a ghost?  Why does the class have a student in charge of countermeasures?  No one wants to tell Kouichi what is happening, but he eventually learns of the class of 1972.

In 1972, the most popular student died in the middle of the school year.  However, the other students refused to recognize the death and continued to act as though the student was still alive and well.  Even the teacher participated in the fiction.  Then, in the class graduation photo, the dead student was standing among them!

Ever since, the class has been cursed with mysterious deaths.  Students, their siblings, their parents, or even their grandparents have died in bizarre accidents during the school year.  One countermeasure has been to pretend a student didn't exist, a reverse of the 1972 event.  Kouichi's midyear arrival has foiled that and now the deaths are spreading.  How can they stop the carnage?  One student did, back in 1983.  If only they could find out how he did it?

Though entertaining, it is full of plot holes.  One of the easy fixes for that is everyone gets a limited amnesia after they graduate, so that previous students don't clearly recall how all went down.  Also, school records mysteriously change, not by the hand of some villain but as part of the strange curse.  That the original student didn't have reason to haunt anyone made the initiation of the curse perplexing.  Maybe the explanation was lost in translation.  Then again, maybe the big explanation was being saved for the next season.  As this is 12 years old, that next season is not likely to happen.