[ A tactic nobody would see coming: walking straight into the office and pulling open the drawers.

He doesn't miss the "we," but he doesn't call Dazai out on it either, instead choosing to rest the side of his face on Dazai's head so he can do the thing where he smiles a little to himself and thinks Dazai doesn't know. ]

That sounds complicated... Is there a lot of security around the office? I'd bet. It would take at least one party to distract, while the other infiltrates, wouldn't it?