You do have the right idea there, but if everything's set up so... [Mahiru woozily waits for a word to come to her then proceeds as if this is the most natural idea in the world] Fancy. Would they really just leave the mastermind's room unlocked?

[Mahiru puckers her lips for a moment before jerking her head back in the direction whence she came.] You can look in my room if that'd calm you down about whether these dorms are the same.