| No. |
Original air date |
Summary |
| 1 |
January 9, 2012 |
Kōichi Sakakibara transfers into Class 3-3 at Yomiyama North Middle School and senses that something is deeply wrong with his new classmates, who all seem afraid of something. |
| 2 |
January 16, 2012 |
While recovering in the hospital, Kōichi meets a mysterious girl named Mei Misaki. When he finally joins his class, he finds that none of his classmates seem to acknowledge her presence. |
| 3 |
January 23, 2012 |
Kōichi grows suspicious of a set of unexplained "special rules" that his class quietly follows, and strange, unsettling incidents begin to occur around him. |
| 4 |
January 30, 2012 |
As Kōichi tries to learn more about his class's past, he uncovers a dark history connected to a tragedy from 26 years earlier. |
| 5 |
February 6, 2012 |
The truth behind Class 3-3's curse is finally revealed, along with why Mei exists outside the rest of the class's awareness and what it means for everyone's safety. |
| 6 |
February 13, 2012 |
Kōichi and Mei grow closer as they face the dangers surrounding the class together. |
| 7 |
February 20, 2012 |
Shocking events shake the class after a teacher connected to the countermeasures meets a horrifying end in front of the students. |
| 8 |
February 27, 2012 |
The class travels together to the beach, hoping for a brief escape from the curse, but danger is never far away. |
| 9 |
March 5, 2012 |
More deaths push the class toward desperation as they search for any way to stop the curse. |
| 10 |
March 12, 2012 |
Investigating a method that reportedly stopped the deaths fifteen years earlier, Kōichi and his classmates uncover a dangerous secret. |
| 11 |
March 19, 2012 |
As the truth about who does not truly belong in the class comes into full focus, the students plan a drastic measure to end the curse for good. |
| 12 |
March 26, 2012 |
In the season finale, the class confronts the source of the curse directly, risking everything to finally bring the deaths to an end. |
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