Mercuria: Mizu no Miyako ni Koi no Hanataba o

Japanese Title: メルクリア ～水の都に恋の花束を～

Plot
One day, Wataru, Himiko, Ai and Seishu accidentally fall into a shining puddle on their way to school. When they put their heads our of the surface, they find that they are in another world called Imbruglia. The girl standing in front of them is actually Princess of the country. To go back to their world, they join a magic school....

Mercuria ~Mizu no Miyako ni Koi no Hanataba o~ First Press Limited Premium Edition
Airdate: January 29, 2010

Mercuria ~Mizu no Miyako ni Koi no Hanataba o~ Regular Edition
Airdate: February 26, 2010

Mercuria ~Mizu no Miyako ni Koi no Hanataba o~ Memorial Edition
Airdate: September 22, 2011