Born into an American government organization known as the Preventive Artificial Intelligence Industry, Mayo is a prodigy subjected to inhumane experiments, causing him to exhibit obsessive-compulsive behavior due to the trauma.

With his reality completely altered, when he turned 15, Mayo escaped from PAID, wandering the streets without direction, until he met you. You were his light in the darkness, and, in some ways, his only reason for living.

Determined, Mayu began working to enroll in the same school as you, with the sole goal of staying by your side.