Please picture an annoyed Taku staring out of the monorail's window while listening to Shiori's ramblings about cute guys. He COULD just go away or hear music, but for some reason, he doesn't. (Maybe she's not the only tsundere around...)

We finally reached the room with the mirror! Yay!

Kei: "...and yet, you still remembered all of this."
Taku: "Yes, I know. It's pretty worrying... Anyway, let's go. We're almost there!"

They arrive at the storage room. Taku is relieved that they made it after all this nonsense, but Kei is getting worried again.

Kei: "Finally... I hope she's really here..."
Taku: "Let's check."

They open the door and spot a seemingly empty room... but there's also a mirror that reflects both Taku and someone lying on the sofa who can't be seen from the doorway.