After watching it, I knew this series was an instant high school comedy favorite and an anime favorite of 2016. The anime is based on a manga (which I had never heard of before) about three improbable adolescent girlfriends who also have no formal names or surnames. They are just nicknamed Galko, Otako, and Ojou. The females come from various high school ranks, as you would call them. I've been a fan of high school-themed movies and television series since I was in eighth grade.
In any case, Galko is a popular "gyaru" (fashionista gal) who speaks sharply. Otako is an "otaku" (anime nerd) bookworm, and Ojou is a proper, rich girl who is somewhat of an airhead. Throughout the episodes, the three explore some filthy subjects and cope with their friendship. It has been a week since I finished the series, and admittedly, I don't know which character I like, but I'll say Otako because I am an "otaku" myself.
So anyway, I found the animation awesome and the story lighthearted and hilarious. And overall, I really love this anime series.