Thanks to a tip from Shura Striker at IDOLcore on Facebook who suggested I check out a YouTube channel with some idol videos on it, I found another idol group that I like. The group is CoCo DeCoRu, a young group that is the sister group of Kimitomo Candy.
CoCo DeCoRu are a four member idol group that debuted on July 27, 2013. All four members were born in Takamatsu, Kagawa Prefecture. The official website doesn't give much in the way of information, so I don't know anything more than this about their history. CoCo DeCoRu don't have a single available yet, but if you check out their YouTube channel you will find four lyrics-only videos with the studio versions of all four of their original songs. Here is a recent live video.
Yoshioka Ruka - Born on January 25, 2000
Nishihara Kurea - Born on March 30, 2001
Arai Momo - Born on April 2, 2001
Fujii Yumi - Born on April 25, 2002