This is a Japanese anime site that contains high school humor and is not controversial to me. It has some innuendo and things blowing up but falls into the mature ratings. Nothing hard core at all. It has no ratings before this, good or bad, but is given a dangerous rating. The anime I was watching was a serial and i was blocked at the third season out of five. I se no reason for this. Sometimes it comes up with some bad advertisements. But those get eliminated quickly.