Since early childhood, Sora has suffered from an inexplicable, incurable condition. In short, this condition leaves her with a perpetual sense of being empty, hollow, and incomplete. As a result, he has never been able to experience satisfaction, fulfillment, or happiness, and has not been able to experience emotions in the same capacity as other people. When five girls of his school disappeared, he was arrested and sent to an asylum.Some believe in his innocence, others believe he killed them.