As it’s been a 5 days that agency members have heard noises of something walking around their agency

As they have heard movement and clacking sounds,maybe the clack is sound something moving of nails or animal?

As once dazai and ranpo and kunikida decide see what could be leaking around

Ranpo:what could be here in the agency?

Kunikida but more is why is here?

Dazai:As he hearing for any move to see what he hearsjust a mystery to solve I guess at