Masaharu Tsuwabuki is a normal student, though not very social. One day he meets a new student named Sumomo Akihime, and another girl named Nadeshiko Yaeno, Sumomo's close friend. That same afternoon, he suddenly bumps into Arthur, a servant of Nona Yūki from Figurare who at the time was disguised with a mask. The collision causes Arthur to drop a bag full of magical potions; amid gathering up the scattered cans, one of them is accidentally switched with Masaharu's soda can. Upon drinking it, he transforms into a stuffed animal lamb at night. He must collect seven stardrops, in order to return to normal. There are two primary worlds within the story of Nanatsuiro Drops: the human world called Retroscena, and a magical world called Figurare from which the Stellar Spinners originate. There are currently two schools that teach magic within Figurare: Pramu Clovis and Sentou Asparas. According to Natsume, each year the two schools pick their top Stellar Spinners to send to the human world to capture seven stardrops in a goodwill competition to improve relations.
Nanatsuiro Drops is an adult visual novel developed by UNiSONSHIFT and was released on April 21, 2006 for Windows PCs. The art in the game was provided by Noizi Ito. The game was ported by MediaWorks to the PlayStation 2 on September 20, 2007 with the adult content removed under the title Nanatsuiro Drops Pure!!. A version based heavily on the anime and playable on the Nintendo DS was released in May 2008 by ASCII Media Works.
Light novels
A light novel titled Nanatsuiro Drops, written by Tamaki Ichikawa, with art by Noizi Ito, was published by Enterbrain on June 30, 2006. A two-volume light novel series titled Nanatsuiro Drops Pure!!, written by Kaya Akasaka and illustrated by Yuki Takami for the inside illustrations and Noizi Ito for the cover art, was published by ASCII Media Works between September 10, 2007 and May 10, 2008.
Manga
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.
A 12-episode anime series produced by Studio Barcelona aired in Japan on Chiba TV between July 3 and September 30, 2007. Two pieces of theme music were used for the anime: one opening theme and one ending theme. The opening theme is "Shining stars bless☆" by Kaori Utatsuki, and the ending theme is "Mo・o!" by Loverin Tamburin.
