The Happy☆Material OP Single - January CD was released in Japan on February 16, 2005 by KING RECORDS via their Star Child label for ¥700. This CD was released for XEBEC's TV anime series that would start airing in January of the same year.
The CD is part of a collection that is focused on the opening theme of XEBEC's TV anime series, the song, Happy☆Material. This is the first release of six separate CD's, each performed by a set of the series' voice actresses. Aside from the singers, the arrangement of the song itself was different for each new CD release and would release monthly between the months of January and June. Each version of the opening would appear in the anime series for a select number of episodes.