multiple ova episodes have been released. ova 1: "the arrival of lev!" was released on november 9, 2014, while ova 2: "vs. "failing grades"" was released on may 2, 2016. 2 new ova episodes, ova 3: "land vs. sky" and ova 4: "the path of the ball" were released on january 22, 2020.