When we told Kalafina fans to keeps their heads up for the Fate/Zero second season end song due to its being produced by Yuki Kajiura, we had no idea that a week later we'd be telling you Kalafina themselves would be doing the opening, but that is how it worked out!
Tower Records tweeted the news, which was announced at a Kalafina concert. Their single due out April 18th, "to the beginning," will serve as the opening song opposite the ending done by newcomer Luna Haruna.
Kalafina has previously provided music for Kara no Kyoukai, So Ra No Wo To, Black Butler, and Puella Magi Madoka Magica. Fate/Zero will be back on the air this April.
via Hachima Kikou