FYI the artist made a sequel comic for Halloween this year. It's on his furaffinity account. Here's the first page (need an account to see it) https://www.furaffinity.net/view/54253489/
He includes some short captions that give more context- for example, it's confirmed in the second comic that at the end of this one, the guy is trapped in this gargoyle "cocoon", slowly being pumped full of cum and metamorphising until a year later when the gargoyle comes to life again. It's hot as hell.