Music Original Sound Track (O.S.T.)

Opening Themes

 * "COLORS" by FLOW was the first opening theme and was used for episodes 1-12 of Season 1.
 * "Kaidoku Funo" by Jinn was the second opening theme and was used for episodes 13-23 of Season 1.
 * "Hitomi no Tsubasa" by Access was the third opening theme and was used for episodes 24 and 25 of Season 1.
 * "O2" by ORANGE RANGE was the fourth opening theme and was used for episodes 1-12 of R2.
 * "WORLD END" by FLOW was the fifth and final opening theme and was used for episodes 13-25 of R2.

Closing themes

 * "Yuukyou Seishun Ka" by ALI PROJECT was the first ending and was used for episodes 1-12 of Season 1.
 * "Mosaic Kakera" by SunSet Swish was the second ending theme and was used for episodes 13-25 of Season 1.
 * "Shiawase Neiro" by ORANGE RANGE was the third ending theme and was used for episodes 1-12 of R2.
 * "Waga Routashi Aku no Hana" by ALI PROJECT was the fourth and final ending theme and was used for episodes 13-25 of R2.