When a number of female murder victims are discovered in Ueno Park with lilac flowers in their mouths and one of Shizuru's books by their side, rumor spreads that he may have some involvement in the case. Worried for her friend, Tsugumi learns that the murders seem to be inspired by a certain book where both Shizuru and Sasagoi-san have ties to the author. When Shizuru is taken away by the police for questioning, Tsugumi works with the rest of Fukurou to find the real killer before it's too late.
According to eyewitness testimony 
from the third incident last night,
وفقًا لشهادة شهود العيان من
،الحادثة الثالثة ليلة البارحة
Dem Zeugen des dritten Vorfalls
gestern Nacht zufolge
Según el testigo,
Según el testigo,
Il a vu le troisième meurtre, hier.
Stando a quanto racconta il testimone oculare
del terzo omicidio di ieri notte,
Segundo a testemunha ocular do
terceiro incidente na noite passada,
Судя по словам свидетеля третьего
случая, что был прошлой ночью,