That could actually have been his compromise between advancement and romance--he honestly thought he was in love with Satou, and who better to understand a policeman's lot?

Aside from the whole 'double-seme' vibe. XD Kobayashi-sensei is sweet enough to put up with him, and won't have to be a housewife for regulations' sake. She doesn't quite seem the sort to quit just because it's expected either.