Mahou Sensei Negima, which means, of course "Magical Teacher Negima," is not a good show by any stretch of the imagination. For ecchi about a Harry Potter clone teaching in the JET program, however, it is pretty funny. It's by that Love Hina guy. I've only seen one DVD of Love Hina, but I'm on volume 6 of the manga, and so far I think the anime is better.
In the above scene from Negima, we get a mysterious introduction to the Library Search Squad, which seems to involve speluncking! I'm in favor of that, as N. would say! Click the picture above for more images.