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."
It's like the room of someone 
who's lost all their willpower.
...كأنّها غرفة شخصٍ فقد قوّة إرادته
Wie der Raum von jemandem
ohne Willenskraft.
Es como la casa
de una persona sin energía.
Es como la casa
de una persona sin energía.
Comme si celui qui l’occupe
était fatigué de vivre.
Sembra la stanza di una persona 
che ha perso ogni voglia di vivere.
Parece a casa de alguém que perdeu
toda a força de vontade.
Похоже на дом человека без воли к жизни.