Gorham's disease

Wow.

It's this extremely rare disease called Gorham-Stout

syndrome

or vanishing bone disease.

When Takuya looked at it, he could not believe what he saw.

It would turn out Takuya had an extremely rare condition called Gorham Stout Disease, which is more commonly known as vanishing bone disease.

It happens when a person's body just randomly starts breaking down and consuming their own bones.

And in Takuya's case...