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.
You're usually holed up in 
your underground laboratory.
.أنت تحبس نفسك عادةً في مختبرك تحت الأرض
Sonst verschanzen Sie sich
doch in Ihrem Kellerlabor.
Normalmente estás
encerrado en el laboratorio.
Normalmente estás
encerrado en el laboratorio.
D’habitude, vous restez enfermé
dans votre laboratoire.
Di solito te ne stai chiuso
 nel tuo laboratorio sotterraneo.
Você geralmente fica trancado
dentro do laboratório subterrâneo.
Обычно ты запираешься
в своей подземной лаборатории.