Maybe he was only interested in the beginning part of what you had to share. It could be that the first story caught his attention briefly but then something else distracted him from watching the rest.
Perhaps he's a bit shy or hesitant to respond to your text directly. By watching your story, he can keep a bit of distance while still being involved. It might also be that he was in a hurry when he saw your text and only had time to quickly view your story.
Derez Deshon could be an individual known within a particular community, perhaps among your friends or in a specific social circle. When he watched your story, it indicates that he took the time to look at the visual or textual content you put out there. It could be that he's interested in what you have to say or show, or it might just be a casual view.
It's difficult to know exactly. It could be your mutual followers, people who follow similar accounts, or even someone who was just scrolling through and happened to stop on yours.