Mei Misaki was cute, athletic and one of the most popular girls in her school. Why should a little thing like death change that? Now, 23 years after Mei’s mysterious demise, a new transfer student discovers that not only is his school’s student body one corpse short of a full roster, but that some secrets never leave high school. And what’s more, all of this may somehow be tied into his own family past. What is the secret and how does it all connect? And even if Kouichi does figure it out, will that knowledge help save him? As the school bells toll a deadly dirge and students begin to die, things that were never properly buried come back to haunt the high school of the damned in ANOTHER!
Kouichi Sakakibara has just arrived in Yomiyana, and he's already hospitalized with a collapsed lung. After joining the local middle school almost a month late, he becomes friends with someone he met while in the hospital--a quiet girl with an eye patch.
Kouichi's friendship with Mei seems to be one sided: he takes every chance he can get to speak to her, but she never seems to understand what he says. Her replies seem more cryptic as the days go by, and their classmates become increasingly suspicious.
A studio crowded with old dolls is the perfect place for Mei to tell Kouichi the tale of 3 students' mysterious deaths 26 years ago. Finding out more information from his classmates proves difficult, but his aunt Reiko is willing to tell him more.
The "Class 3 Curse" rumor gains notoriety with the sudden and accidental death of a student. Kouichi, desperate to know more, turns to Mei who refuses to tell him anything else. Akazawa, the head of countermeasures, begins the investigation on Class 3.
Following Mizuno's bizarre accident, the tension rises in class 3, and a new class officer is chosen without Kouichi knowing: Akazawa. Rumors are spreading, but no one is willing to say what.
A charm has been evoked by class 3 for the past 26 years to ward off any further calamitous incidents. Kouichi begins to accept what's going on around him. However, he deems it unreasonable and begins spending more time with Mei.
Fresh blood is spilled, and class 3 realizes that the calamity hasn't stopped. The Charm rituals are called off. Everyone is on edge, wondering who among them is actually dead. Meanwhile, Kouichi learns of an incident 15 years in the past.
A resort hotel is the rendezvous destination for Kouichi, Reiko and Matsunaga. As they spend a day sunning at the beach, they run into Mei, who's staying nearby.
An unexpected accident outside Yomimaya once again puts class 3 on edge. After Matsunaga's vague whispers point to the classroom, Kouichi decides to investigate the old class three 3 homeroom in the former school building.
The casualty count continues to rise, and Kouichi's search for Matsunaga's tape is successful. During the class trip, the friends gather to listen, and to find out what Matsunaga did to stop the Calamity.
Matsunaga's tape has at last revealed the secrets to stop the Calamity. Kouichi and his friends try to figure out how to avoid future disasters when the tape disappears and falls into the wrong hands.
Chaos runs through the lodge hallways, as students desperately seek the key to stopping the Class 3 Calamity once and for all. Can Kouichi find the answer before another victim is claimed?