Akira Kurose, a philosophy student disillusioned with life, dies in a sudden accident and awakens in Astraeon, a fractured fantasy world shaped by belief itself. Summoned souls fight to prove whose ideals deserve to define reality, ruled by seven Sovereigns embodying opposing philosophies. Akira bears the Mark of Silence, a rare power that negates all magic—but only when he abandons his sense of self. As wars of ideology erupt, Akira battles champions of faith, order, and nihilism while losing fragments of his identity. Forced to choose between meaning and freedom, he faces a final decision that will redefine existence itself.