Well there was development, Yumesaki-sensei started as someone that was afraid of her Succubus nature and repressed it and we had no idea she felt that way about Kogarashi (as those situations before were played for laughs), now she is trying to control her abilities and we learned how she really feels about him.
Its a minor arc about a supporting character but then again, I enjoy this series for having small arcs like To-Love-Ru had back in the day, not everything needs to have 3-5 volume long arcs.