After some confusion regarding the air date of Horizon in the Middle of Nowhere's second season, the official Twitter account shed some light today. Roughly translated:

"Horizon in the Middle of Nowhere, the last episode will finally be shown tomorrow. We're currently having a one shot all night screening of all the episodes, but it was announced a bit ago up on stage that a second season is going into production! It's planned to begin airing in summer 2012, so please anticipate it!"

Glad that is cleared up! 

via Otakomu