Asa made Jugyou Chu!, Nande Koko ni Sensei ga!? Recommendations
The same situation where guy get's involved with a teacher who seem to get into an awkward situation called "ecchi"
a similar female big-tits teacher-male student situation.
a main difference (personality-wise) is that Ayana from asamade was one huge airhead while kojima seems to be more down to earth.