Age 12 (12歳。, Jūni-sai.) is a Japanese slice of life romance shōjo manga series written and illustrated by Nao Maita. It began serialization in August 2012 in Shogakukan's Ciao manga magazine and ended in October 2019. It was published in twenty volumes. The manga was adapted into an original video animation that was released in April 2014 and it was also adapted into a video game and a TV anime series released in 2016. Source: Wikipedia (en)