If you're wondering what will the storyline be...
If it'll just be a normal slice of life high school drama, no it's not.
Marshall can't recognize faces? Is it just a body illness or maybe something more?
Just as you were expecting
It was just an illness.
Nah I'm kidding. He has a sealed heavenly eyes, it was an ancient curse put down by a powerful family centuries ago. Now why was it sealed?
I won't explain. Now, how come he has heavenly eyes? It's actually something hereditary in the family, It has been a long time since a child has been born with it in they're family.
So as the story goes on, as a mary sue character, Marshall will meet a master who will teach him how to unseal his eyes and undo the curse. Of course the Master isn't just a nobody, he is also a famed assassin in the eastern parts.
He will also gain enemies, and maybe, just maybe, he might travel through dimensions and conquer them as well, with some women. Of course, or not.
So I hope you got the story, I might or might not continue this. But have patience, I might.