I have 2 Steve Harrington x Reader books in the works. I'll give a small explanation of both. They'll get released at different times. The first one will have the first chapter out on Sunday.
The Babysitters (Steve Harrington x Y/N Henderson):
You hooked up with Steve back in sophomore year and even though he's an absolute douchebag, you grew feelings for him after that night but you had to ignore the feelings cause you knew it wasn't good for you. And then he started dating Nancy so there was no way you were going to interfere. But one day after Steve and Nancy break up, you think it's your chance but at the same time, you don't want to rush Steve or anything after a heartbreak. You're Dustin's older sister, in the same grade/age as Steve (s1 a junior). In season 1 you spend the majority of the time with Dustin and his friends. More Steve and reader interactions starting in season 2 so don't worry.
and now for the second book-
When I First Met You, I Hated You (Steve Harrington x Y/N Hargrove)
Y/N and Billy are identical twins. From looks all the way to personality. Y/N was never as bad as Billy but after their father became more abusive and their parent's divorce, and everything that just went the wrong way in their life, she's changed and now she and Billy are the exact same which also means they have a pretty close relationship despite the fact they're blood. After their move to Hawkins, they become pretty popular quickly at the high school for being known as the new hot kids. The once used to be popular boy, Steve Harrington fell for Y/N but only for her looks at first. After he met her brother Billy and soon found out she's just a female version of him, he despised her. She, on the other hand, didn't want him to hate her because she also fell for him. First, because she found him good-looking but later found out he was actually a good person and she thought someone like him could actually help her with her problematic life.