Bishounen silliness that goofs around with the whole fantasy genre of Earthlings magically finding themselves in fantasy worlds where they are inexplicably important. Rather that travelling to the magical world in question by magic portal or wardrobe, hero Yuri Shibuya is instead sucked down a school toilet. Junji Nishimura (Urusei Yatsura) does his best, but struggles with a budget that must be comparatively lower that what he had to work with during the peak years of Urusei Yatsura.
Successful enough to produce 2 sequels on TV, it’s another example of how Studio Deen’s approach of low budget shows aimed at niche audiences that are already fanatical about the properties in question (this was a light novel originally) has kept them chugging along. Even though in terms of creativity and production quality, their best years are years behind them.