steve harrington for a revenge/slow burn/coming-of-age type of line where chrissy or maybe even both of them are cheated on, then "pretend to date" as a form of revenge. they were friends when they were kids up until steve got too big for his britches and went to middle school, leaving his kid-sister-esque friend chrissy in the dust. there's "no feelings there" at first, but of course that changes.