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.
In exchange,
،بالمقابل
Im Gegenzug dafür
A cambio, mantendremos el asunto 
en secreto por una semana.
A cambio, mantendremos el asunto 
en secreto durante una semana.
En échange, j’accepterai de garder
le secret pendant une semaine.
In cambio
Em troca,