The show relies heavily on "coincidence comedy"—situations where the male protagonist walks in on the female lead in compromising positions. While this is a tired trope, Teacher executes it with such absurdity that it becomes hilarious rather than just titillating. The situations are so convoluted they loop right past "creepy" and land firmly in "slapstick."
If you are looking for the manga series (also known as Nande Koko ni Sensei ga!?
" (Nande Koko ni Sensei ga!?) Season 1 using a "16zip" file format.
You can watch the anime adaptation of the series on Crunchyroll .