長鴻出版社
"Koharu Biyori" is written and illustrated by Takehito Mizuki. The manga was serialised in MediaWorks's monthly "Dengeki Daioh" before MediaWorks moved the title to the quarterly "Dengeki Moeoh". The manga is licensed in North America by ComicsOne. The English license was transferred to DrMaster after ComicsOne's collapse. As of February, 2009, MediaWorks has published four "tankōbon" of the manga. ComicsOne released the first volume of the manga on February 16, 2005. The manga is licensed in Taiwan by Ever Glory Publishing.