Saikawa and Nishinosono return to the camp, putting off trying to find a solution to the case. But they can't stop thinking about it. They go back to the lab and investigate Dr. Shiki's rooms again, where they find a strange number that is a clue.
I figured out why I want to stay.
.عرفت لِم أريد البقاء
Ich weiß jetzt,
warum ich hier bleiben möchte.
Ya sé por qué quiero quedarme.
Ya sé por qué quiero quedarme.
J’ai compris mon envie
de rester ici.
Ho capito la ragione per cui voglio restare.
Eu descobri o motivo 
pelo qual quero ficar.