Yōko Hikasa
The anime's soundtrack is composed by Hikaru Nanase. The opening theme song for the anime is "Straight Jet", performed by Minami Kuribayashi. The ending theme song is "Super∞Stream", with the first episode version sung by Yōko Hikasa, the second and third episode version sung by Hikasa and Yukana, the fourth and fifth episode version sung by Hikasa, Yukana and Asami Shimoda, the sixth and seventh episode version sung by Hikasa, Yukana, Shimoda and Kana Hanazawa and the final version for the rest of episodes sung by Hikasa, Yukana, Shimoda, Hanazawa and Marina Inoue. Each version of the song reflects the voice actresses' character who is running with Ichika in the episodes' ending credits. The CD single for "Straight Jet" was released on January 26, 2011, and the CD single for "Super∞Stream" was released on February 16, 2011. Both singles are published under the Lantis label. For the OVA, the ending theme is by Yōko Hikasa. For the second season, the opening theme is "True Blue Traveler" by Minami Kuribayashi and the ending theme is "Beautiful Sky" by Yōko Hikasa.