Well, I have to say, episode 12's preview pretty much told us everything about this episode besides how Kotomi's parents died. But there's one thing that I find interesting. Has Kotomi been portraying herself has she has to the outside on purpose, or is it the result of those long days of studying and no communicating? The latter makes sense, but it could also be that she's acting all formal in hope that she's a "good girl" and that she can redeem for her actions.
I liked this episode, good ol' Clannad feel is back after the new year break.