I’m pretty certain this is artwork by Kahori. It has his* very distinctive artistic style and the symbol/signature in the corner resembles the ones on other drawings from him.
Like a lot of his work it shows a more delicate and less forceful style of domination than is normally seen in other femdom images. His artwork often does a good job of conveying the idea of a relationship between the participants, rather than simply focusing on the mechanics of a kinky activity.
Little thoughtful moments in a scene, like wiping the cheek of a gagged slave, really touches something deep within me. That’s partly because it plays to the idea of the caring sadist, a blend of sweetness and acidity that I find so appealing. But I think it’s also because it emphasizes what the dominant is not doing. She could simply remove the gag if she wanted him to stop drooling. Wiping the cheek instead reinforces the fact that removal isn’t currently an option. She’ll do what’s necessary to keep him exactly as she wants him.
* I’m using a male pronoun in this post for clarity, but I don’t actually know the gender of the artist. Apologies if I’ve got it wrong.