About Marble
There are multiple artists named Marble:
1) Marble is a Japanese pop duo comprised of micco (vocals) and Tatsuya Kikuchi (guitar). They are best known for performing the ending songs for the anime series "Hidamari Sketch" and "Kamichama Karin," as well as the opening song for the anime Kimikiss Pure Rouge and the ending theme for Hatsukoi Limited. They released three singles (Mebae Drive, Kuuchuu Meiro, and Aozora Loop) in 2007 and released their first full album, titled Nijiiro Humming, in February 2008.