Seishirou Katou

Koyama Sachi, a high school girl living in Iwaki City, Fukushima, has been deeply scarred by the Tohoku earthquake of 2011. Since it occurred, she's distanced herself from her friends and family, and shows no interest in people or romance. A violinist since childhood, she's a member of her school's music club and practices every day to prepare for the quartet performance at the school cultura...

Murdered on graduation day, a teacher wakes up one year earlier and tries to figure out which of her 30 students is a future killer.