This is the fourth season in the Symphogear series.
Senki Zesshou Symphogear is a series with ‘music’ as it’s main aspect by Noriyasu Agematsu, who is representing the sound production group *Elements Garden* and Akefumi Kaneko, who has helped produce many games. A manga adaptation was serialized between November 2011 and April 2013 in Kadokawa Shoten’s Newtype Ace.
A smartphone game adaption by Bushiroad called Senki Zessho Symphogear XD Unlimited is scheduled to come out in 2017.
Noriyasu Agematsu and Akefumi Kaneko