Specific Teacher AU

[1talian1ce.livejournal.com]

Hello, all. I'm looking for a specific fic. In it, Gabriel is a surgeon or doctor, and asks Castiel to watch his child while he's out of town for his job. Dean is a teacher - substituting for Sam, who is also a teacher, I believe - and one of his students is Gabriel's child. This leads to Dean and Castiel meeting in some way.

I'm terribly sorry, but I don't remember much more than that, not even the title or author. Though, I do remember it being cute and enjoyable, and would thus like to read it again. Any help would be most appreciated.