There's a rumor going around about the Seven Wonders of Kamome Academy. Nene Yashiro and her classmate, Kou Minamoto, work with Hanako-san to expose a traitor among the ranks of the Seven Wonders. After breaking No. 2, the Misaki Stairs, and No. 5, the 4 O'clock Library, only five remain. Can they uncover the perpetrator before it’s too late?
Sudden, rapid aging wreaks havoc in Nene's and Kou's school lives. Hanako identifies the culprit as a fellow Wonder: the three Clock Keepers, rumored to control time at Kamome Academy. The trio set out to punish the offending apparition, but they'll have to find them first.
One of the Clock Keepers stands revealed... as Nene's classmate Aoi Akane. Hanako proposes they work together to set things right, but past experiences have left Akane with little trust for apparitions.
Nene doesn't have long to live. While Kou struggles with the revelation, Nene goes about her day none the wiser. Only she can't seem to find Hanako.
Nene tries to lift Kou's spirits by inviting him to a summer festival, but Hanako has other ideas.
A mokke escapes containment. Its bite brings disaster. Now they hunger... for candy.
Nene gets to school only to find Hanako sitting in her class. Why are her friends acting like he belongs?
Faced with an impossible school life, Nene and Kou enter a mysterious tower to seek the truth within.
Shijima told Nene to kill Amane. Tsukasa told Nene to kill Amane. Amane took Nene stargazing.
Nene drags Amane out of school and away from Shijima, but escaping a Wonder is easier said than done.
When Hanako reveals the truth, Kou gets confused. Nene gets angry.
Like Nene, the living Shijima is facing her own mortality, but she confronts her future—and her other self.
Nene sets out to leave the painting for good, but Hanako has other ideas.
