Where Every Scroll is a New Adventure
Whenever Arthur and Alfred are in a dangerous situation, Arthur always keeps Alfred in the corner of his eye, just to make sure he’s safe.
Whenever Alfred accomplishes something, Arthur has to resist the urge to pat his shoulder (or his head.) Sometimes he can't hold back the proud little smile that appears on his face and he has to look down to try and hide it.
Meanwhile, when Alfred accomplishes something, the first person he looks at is Arthur, trying to gauge his reaction. Trying to see if the man is happy with him.
A lot of this is subconscious. No matter how many years go by of the word "dad" or "son" not being said, they will still instinctively always see each other that way.
Every now and then they become aware of what they're doing. Alfred forces himself to look away from Arthur's face, thinking, "He's not your dad anymore; you don't need his validation."
Arthur forces himself to stop focusing on Alfred in his peripheral vision, thinking, "He's not your son anymore; he doesn't need your protection."