Galaxy Manga is the manga store run by Masaki O`Cain. The store is located in Tokyo, Japan, although it's exact location is unknown. It is open 24 hours a day and also sells anime and otaku goods.
The store was originally owned by others, with Masaki being the general manager. Eventually, however, Masaki bought the store and now owns it, as well. It is unknown whether they hold events such as signings or appearances by mangaka.
Miara Mitsuki worked as the day manager here from November 2010 until March 11, 2011.