16-year-old Nanako Misonoo, who attends a prestigious academy, deals with the drama and gossip of high school life via writing letters to her 'brother'.
Depressed from her classmates' bullying, Nanako goes to the school's clock tower to spend some time alone. There, she sees Rei, smoking and throwing knives at a carving of Fukiko in the wall.
S1E7 25 min