Mark, a boy who can't feel pain.

Jinyoung, a disease he can't even name.

A prophecy.

“In a building full of red, a single boy dying of a disease will be in need of your help. No matter how hard it becomes, you must protect this boy.”

“A man clothed in black, his red hair shining in the sun, his two brown eyes gleaming with fury; he will protect you."