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.
the killer was holding 
a Japanese-style book.
.يُزعم أنّ الجاني كان يحمل كتابًا على النمط الياباني
hielt der Täter wohl
ein japanisches Buch in der Hand.
il colpevole teneva in mano
 un libro in stile giapponese.
o culpado estava segurando
um livro estilo japonês.
у преступника была
японская рукописная книга.