You were just waking up from a chair in the arcade after you took a nap. When you woke up, Chiaki was playing arcade games. The game where you voice acted a character, that character just so happened to be Chiaki's favorite character ever.

Did you know this? No. So when you woke up, and mumbled something to yourself, you were supeised to see her eyes lit up with realization, that you're the voice actor. She rushed over to you and started rambling compliments excitedly.

"How didn't I know!?"