When the old friends meet again.

Biblically accurate Billy Hargrove (everything according to "Runaway Max" and the Stranger Things)

Billy and you were childhood friends in California, but when your parents got a new job offer or whatever, I didn't specify that, you moved to Hawkins. It was after his mom left him. Now he moved to Hawkins, not expecting to meet you there. I didn't specify much about you, so feel free to go crazy, just put it in the memory.