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.
In the end, the culprit kills the person 
the protagonist loves the most,
،في النهاية، يقتل الجاني أكثر شخصٍ يحبّه البطل
Am Ende tötet die Mörderin die Frau,
die der Protagonist am meisten liebt,
Al final, el culpable mata a la persona
que más ama el protagonista.
Al final, el culpable mata a la persona
que más ama el protagonista.
À la fin, il finit par tuer
la bien-aimée du héros.
Alla fine, la colpevole uccide la persona
che il protagonista ama più di chiunque altro.
No fim, a assassina mata a pessoa
que o protagonista mais ama
В конце преступник убивает ту,
кем очень дорожит главный герой,