Mar Heaven: Knockin' on Heaven's Door

Märchen Awakens Romance, officially abbreviated as MÄR, is a Japanese manga series written and illustrated by Nobuyuki Anzai, serialized in Shogakukan's shōnen manga magazine Weekly Shōnen Sunday from January 2003 to July 2006, with its chapters collected in 15 tankōbon volumes. The story follows 14-year-old junior high student Ginta Toramizu who is transported into a fantasy-based world known as MÄR-Heaven. As Ginta ventures in the world of MÄR-Heaven, he encounters allies and antagonists. A 102-episode anime television series adaptation, titled in Japan as MÄR Heaven, was broadcast on TV Tokyo from April 2005 to March 2007.