[Rei notices this too. Clearly, he's much much closer to Ami than she'd originally thought. Ami-chan almost never forgot her politeness, and it just seemed odd]

Yes, please, sit down. Its no trouble at all, especially with Usagi-chan out of the house. And...I don't mind if you call me Rei-san. Or...would it be proper to address us both as Sensei? [She offers Ami a bit of a funny smile, knowing that Ami was so proper when it came to titles]

So, where should we begin? Can you write Hiragana and Katakana yet?