In order to learn more about Sensei's movements, Mikado and Hiyakawa make a plan to astral project into his house with the help of Mukae, Erika, and Sakaki. But they discover that Sensei's house was built on the site where the Palm of the Hand Research Society used to stand. Mikado recommends that they call off their plan out of concern for Hiyakawa, but Hiyakawa calmly replies "I won't remember. I never forgot."
Sensei might be making use of 
something that's still there.
ربما يستغلّ سينسي شيئاً
لا يزال موجوداً هناك
Vielleicht hat Sensei etwas benutzt,
was dort verblieben ist.
Quizás el maestro usó algo
de lo que quedó allí.
Quizás el maestro usó algo
de lo que quedó allí.
Le professeur se sert
de ce qui est encore là.
Forse il professore ha usato
 qualcosa che era rimasto qui.
O mestre deve estar se aproveitando
de algo que permanece aqui.
Хотел использовать то,
что от них осталось?