Mar Heaven had a sequel Manga under the title Mare Omega.
Based on a Japanese manga series written and illustrated by Nobuyuki Anzai, serialized in Shogakukan's Shounen manga magazine Weekly Shounen Sunday from January 2003 to July 2006, with its chapters collected in 15 tankobon volumes.
VIZ Media licensed only the first 52 episodes of MÄR, and released only the first 16 on DVD before cancelling the rest of the releases.