Dengeki Comic Gao!
A manga series titled "Nanatsuiro Drops", illustrated by Yūki Takami, was serialized in ASCII Media Works' "Dengeki G's Magazine" between the November 2006 and May 2008 issues. It was then transferred to "Dengeki G's Festival! Comic" and ran in that magazine until the August 2010 issue. Six "tankōbon" volumes were released between April 27, 2007 and October 27, 2010. Another manga series named "Nanatsuiro Drops Pure!!", illustrated by Sorahiko Mizushima, was serialized in the shōnen manga magazine "Dengeki Comic Gao!" between April 27, 2007 and February 27, 2008 published by MediaWorks. The manga was cancelled with the discontinuation of "Dengeki Comic Gao!" in February 2008. A single volume was published in November 2007.