cocoon - One Summer of Girlhood

Cocoon (Japanese: コクーン, Hepburn: Kokūn) is a Japanese manga series written and illustrated by Machiko Kyō (今日マチ子). It was serialized in Akita Shoten's josei manga magazine Elegance Eve from March 2009 to May 2010. An anime television film adaptation produced by Sasayuri premiered in March 2025.