The Second Coming

(Will x Reader) Will Byers has returned, but at what cost? You were his best friend, one small problem though; you're not real. You're his coping mechanism - a shining piece of hope in a dark world. His imaginary friend. And now that you've returned Will is going to need you more than ever. Will you help him, or end up trying to stop him from becoming something he wouldn't even think about in his darkest of dreams...