I've just read up to chapter 2 so far but here is my prediction: the reason the mc cannot see his own aura is because his aura is 'visible light' or white light which is the type of light that allows us to see in the day. the mc is a perfect match for the ml because the ml is 'rainbow' or in other words all the components of visible light when it is separated, so basically they have the same aura. I doubt this is correct but we will see.
I've just read up to chapter 2 so far but here is my prediction: the reason the mc cannot see his own aura is because his aura is 'visible light' or white light which is the type of light that allows us to see in the day. the mc is a perfect match for the ml because the ml is 'rainbow' or in other words all the components of visible light when it is separated, so basically they have the same aura. I doubt this is correct but we will see.