But you still wanna be a researcher?

When there's a mystery, you wanna solve it by any means necessary.

It's the nature of a scientist.

...Before you start talking down to me,

take a look below.

There's another door, but there's no way in.

Moreover, it says "No entry except for staff."

No entry except for staff.

We were employed by Kushiro-sensei, so we're staff, aren't we?

Besides...

I have one more card.