卡利古拉

“毁坏理想，回归现实——”

响彻城市的美妙歌声。如同被拥有绝大人气的偶像“μ”所守护着一般，平稳的日常在城市中流逝。

式岛律，是宫比市立吉志舞高中的一年级生。运动、学习、受到朋友的关照，在青春的正当中过着充实的高中生活。

时间流逝，到了升入二年级的开学典礼。作为新生代表登上讲台的少年，是本来不可能身在那里的人物——

街中に響き渡る美しい歌声。絶大な人気を誇るアイドル「μ」に見守られるように、この街では穏やかな日常が流れてゆく。式島律は、宮比市立吉志舞高校の１年生。スポーツに勉強そして友達にも恵まれ、青春真っ只中の充実した高校生活を送っていた。時は経ち、２年生として迎えた入学式。新入生代表として壇上に上がった少年は、本来そこにいることがありえない人物で――

What is happiness? Ever the fan of psychology, questions such as this are ones that high school student Ritsu Shikishima likes to ponder as he spends his peaceful days with his friends. His perfect world, however, begins to unravel when he hears a strange voice obscured by static, pleading for help. This voice belongs to μ, a beloved pop idol, whose singing begins to have an adverse effect on the world. Before Ritsu's very eyes, the faces of his friends and family become distorted by glitches as the sound of μ's voice transforms them into Digiheads: berserk monsters bent on the extermination of all those who begin to awaken to the true nature of their existence.

Realizing that he is trapped in a virtual world created by μ called Mobius, Ritsu must now gather everyone else who has managed to realize the truth before they are all eliminated. Together, they will use their newfound powers and weapons granted by their emotions—known as the Catharsis Effect—to fight off the mysterious group known as The Ostinato Musicians as they struggle to escape.

[Written by MAL Rewrite]