Chapter 8 has a small typo on the last page ('Stongly')
This is too cute and I adore it. Every chapter made me giggle. I totally feel a 'cat & dog' vibe between them, with Chidori being expressionless and partially tsun, and Nanoha being bigger, openly cheerful, and wanting to do more lovey-dovey things.
Seriously, look at this face and try not to imagine a wagging tail:
Also, while it makes sense that you could read these chapters in any order, seeing the promise bracelet(fake edit: bracelets!) in Ch 8 made me swoon.