Allegedly these types of schools exist in Japan, and the show popularizes the idea. However, I think it is more bizarre to see that the concept of this show is something that apparently fits well in Japanese culture. The show features talk segments, fortune telling, and - of course - behind-the-scene shots of gravure photo shoots. Bizarre.

In Japanese, gravure can actually refer to any type of glamour (not fashion) modelling - hence nude or non-nude can be considered gravure-style photography. However, the defacto standard is that gravure idols don't do nudity or porn.