In many ways, these are very similar to Momoiro Sisters, but then, that's a natural thing considering they were both written by the same person. Momoiro Sisters' focus was sex and its many different forms (not necessarily physical, silly), but I'm not really too sure what the focus of Sensei no Ojikan is. There's still a lot of sexual topics here, such as Kudou's, umm, interest in Suetake; Kitagawa's, umm, interest in Mika-sensei; and maybe even Watabe's disinterest in Nakayama. I guess the topics are just scattered all over the place.
Regardless, it's entertaining enough in small chunks.