Nanatsuiro★Drops

is a Japanese adult visual novel developed by UNiSONSHIFT and released on April 21, 2006 for Windows. The game was later ported to the PlayStation 2 and Nintendo DS. A light novel, written by Tamaki Ichikawa and illustrated by Noizi Ito, was published by Enterbrain in June 2006. Two manga adaptations were published by MediaWorks and later ASCII Media Works. A 12-episode anime produced by Studio Barcelona aired between July and September 2007.

A two-volume light novel series, Nanatsurio Drops Pure!!, was published by ASCII Media Works under their Dengeki Bunko Imprint between September 2007 and May 2008. It was written by Kaya Akasaka and Illustrated by Noizi Ito and Yuki Takami.

Synopsis
Masaharu Tsuwabuki is a normal unsocial student until 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.