Nene and Kou as they investigate a sudden, rapid aging phenomenon plaguing the school, which they discover is caused by the Clock Keepers, apparitions who control time at Kamome Academy. Their investigation reveals truths about the supernatural world, the twin brothers Hanako and Tsukasa, and a prophecy about Nene's impending death, leading to a fight against fate itself to save Nene and uncover the Red House's mysteries
