It's really a fantastic anime when it started in 2015 the way that the anime goes and the characters development was very good and not like other animes the hero becomes overpowered the first two seasons wasn't perfect but it had a good story building but it kinda focused on sexual scenes some of the time and I think because the wanted to attract people to watch .When the third season appeared they improved and focused in the story and the fights and the anime begin to be better. The fourth season was the best one of all the 4 seasons by far. In my opinion the way that the anime took was right.
