Responses
Maybe it has to do with the plot? Like the closer he gets to Agia (black/dark/moon) the darker his hair?
I thought I was just seeing things :O
They said something to do with his hair being brighter in the moon before. So it might be something to do with that
ken's hair got darker in this chapter and i got confused when i read this ( T﹏T ) i thought its a different person or something