Free! is an anime based on Koji Oji’s light novel “High Speed!”. The Light novel was illustrated by Futoshi Nishiya. The first volume was published on July 8th, 2013 and the second on July 2nd, 2013. The anime adaptation was produced by Kyoto Animation and Animation Do, written by Masahiro Yokotani, directed by Hiroko Utsumi and character design by Futoshi Nishiya. The first season aired starting July 4th, 2013 and ended on September 26th, 2013. The second season aired starting July 2014 and ended September 2014.
"Haruka, Rin, Makoto and Nagisa used to be the members of the same swimming club in elementary school. They won a tournament just before their graduation and then they went separate ways. Time passed and now Haruka has been spending the high school days idly. One day, Rin comes to Haruka and challenges him in a swim. Haruka easily gets overwhelmed by Rin's swimming skill. In order to beat Rin, Haruka establishes the "Iwatobi High School Swimming Club" by gathering Makoto and Nagisa again and drafting in Rei."
Free! Similar Series:
1. Kuroko no Basket
3. Ouran Koukou Host Club