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."
And it's because you aren't 
all here... that you've come.
وبما أنّكم لستم مجتمعين... أتيتم هنا
Und weil ihr nicht vollständig seid,
kamt ihr hierher.
Porque no están todos…
Porque no estáis todos…
C’est d’ailleurs à cause de lui…
Ed è proprio perché non c'è tutta...
E vocês vieram justamente por isso.
И именно поэтому...