a second season aired from october 4, 2015 to march 27, 2016. for episodes 1 through 13, the opening theme song is "i'm a believer" by spyair, while the ending theme song is "climber" by galileo galilei. for episodes 14 through 25, the opening theme song is "fly high" by burnout syndromes, while the ending theme song is "hatsunetsu (fever)" (発熱 - はつねつ) by tacica.