[Conan observes the 'delivery' with displeasure. That has got to be the sloppiest bringing of the mail he's observed -- there are people right there to ask directions, and that empty desk is intended for the new recruits, so not only is that clearly not the place where the package's intended recipient is, but it's in the way.]

Anou, Oneesan--

[She's gone. Huh. Going tip-toe to retrieve it from the desk, Conan's surprised to find it has his name on it. He first checks to see if there is a ticking sound coming from the box -- nothing. That's a good sign, so Conan's going to look and see if it has a return address or directions of any sort beyond his name.]